fix(mcp) : return CallToolResult to prevent structuredContent serialization issue

Tools now return CallToolResult directly instead of Content arrays,
preventing the MCP SDK from auto-generating structuredContent as a
JSON array (which Claude Code rejects — expects a JSON object/record).
Also adds Accept header to test helpers and SSE response parsing.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.mcp.json

@@ -1,14 +1,12 @@
 {
-  "mcpServers": {
+    "mcpServers": {
-    "inventory": {
+        "inventory": {
-      "command": "docker",
+            "type": "http",
-      "args": [
+            "url": "http://inventory.malio-dev.fr/_mcp",
-        "exec", "-i",
+            "headers": {
-        "-e", "MCP_PROFILE_ID=REPLACE_WITH_YOUR_PROFILE_ID",
+                "X-Profile-Id": "admin-default-profile",
-        "-e", "MCP_PROFILE_PASSWORD=REPLACE_WITH_YOUR_PASSWORD",
+                "X-Profile-Password": "A123"
-        "php-inventory-apache",
+            }
-        "php", "bin/console", "mcp:server"
+        }
-      ]
     }
-  }
 }

src/Mcp/Tool/ActivityLogTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool;
 use App\Repository\AuditLogRepository;
 use DateTimeInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -22,7 +23,7 @@ class ActivityLogTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(int $page = 1, int $limit = 30, string $entityType = '', string $action = ''): array
+    public function __invoke(int $page = 1, int $limit = 30, string $entityType = '', string $action = ''): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_VIEWER');
 

src/Mcp/Tool/Comment/CreateCommentTool.php

@@ -9,6 +9,7 @@ use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ProfileRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -30,7 +31,7 @@ class CreateCommentTool
         string $entityType,
         string $entityId,
         string $entityName = '',
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_VIEWER');
 
         $content = trim($content);

src/Mcp/Tool/Comment/ListCommentsTool.php

@@ -8,6 +8,7 @@ use App\Entity\Comment;
 use App\Mcp\Tool\McpToolHelper;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'list_comments',
@@ -21,7 +22,7 @@ class ListCommentsTool
         private readonly EntityManagerInterface $em,
     ) {}
 
-    public function __invoke(string $entityType, string $entityId, int $page = 1, int $limit = 30): array
+    public function __invoke(string $entityType, string $entityId, int $page = 1, int $limit = 30): CallToolResult
     {
         $p = $this->paginationParams($page, $limit);
 

src/Mcp/Tool/Comment/ResolveCommentTool.php

@@ -10,6 +10,7 @@ use App\Repository\ProfileRepository;
 use DateTimeImmutable;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -26,7 +27,7 @@ class ResolveCommentTool
         private readonly ProfileRepository $profiles,
     ) {}
 
-    public function __invoke(string $commentId): array
+    public function __invoke(string $commentId): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/Comment/UnresolvedCountTool.php

@@ -8,6 +8,7 @@ use App\Entity\Comment;
 use App\Mcp\Tool\McpToolHelper;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'get_unresolved_comments_count',
@@ -21,7 +22,7 @@ class UnresolvedCountTool
         private readonly EntityManagerInterface $em,
     ) {}
 
-    public function __invoke(): array
+    public function __invoke(): CallToolResult
     {
         $count = (int) $this->em->getRepository(Comment::class)
             ->createQueryBuilder('c')

src/Mcp/Tool/Composant/CreateComposantTool.php

@@ -10,6 +10,7 @@ use App\Repository\ConstructeurRepository;
 use App\Repository\ModelTypeRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -37,7 +38,7 @@ class CreateComposantTool
         string $prix = '',
         string $modelTypeId = '',
         array $constructeurIds = [],
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         $composant = new Composant();

src/Mcp/Tool/Composant/DeleteComposantTool.php

@@ -8,6 +8,7 @@ use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ComposantRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -24,7 +25,7 @@ class DeleteComposantTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(string $composantId): array
+    public function __invoke(string $composantId): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/Composant/GetComposantTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool\Composant;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ComposantRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'get_composant',
@@ -20,7 +21,7 @@ class GetComposantTool
         private readonly ComposantRepository $composants,
     ) {}
 
-    public function __invoke(string $composantId): array
+    public function __invoke(string $composantId): CallToolResult
     {
         $composant = $this->composants->find($composantId);
 

src/Mcp/Tool/Composant/ListComposantsTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool\Composant;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ComposantRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'list_composants',
@@ -20,7 +21,7 @@ class ListComposantsTool
         private readonly ComposantRepository $composants,
     ) {}
 
-    public function __invoke(int $page = 1, int $limit = 30, string $search = ''): array
+    public function __invoke(int $page = 1, int $limit = 30, string $search = ''): CallToolResult
     {
         $p = $this->paginationParams($page, $limit);
 

src/Mcp/Tool/Composant/UpdateComposantTool.php

@@ -10,6 +10,7 @@ use App\Repository\ConstructeurRepository;
 use App\Repository\ModelTypeRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -39,7 +40,7 @@ class UpdateComposantTool
         ?string $prix = null,
         ?string $modelTypeId = null,
         ?array $constructeurIds = null,
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         $composant = $this->composants->find($composantId);

src/Mcp/Tool/Constructeur/CreateConstructeurTool.php

@@ -8,6 +8,7 @@ use App\Entity\Constructeur;
 use App\Mcp\Tool\McpToolHelper;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -27,7 +28,7 @@ class CreateConstructeurTool
         string $name,
         string $email = '',
         string $phone = '',
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         $constructeur = new Constructeur();

src/Mcp/Tool/Constructeur/DeleteConstructeurTool.php

@@ -8,6 +8,7 @@ use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ConstructeurRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -24,7 +25,7 @@ class DeleteConstructeurTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(string $constructeurId): array
+    public function __invoke(string $constructeurId): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/Constructeur/GetConstructeurTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool\Constructeur;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ConstructeurRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'get_constructeur',
@@ -20,7 +21,7 @@ class GetConstructeurTool
         private readonly ConstructeurRepository $constructeurs,
     ) {}
 
-    public function __invoke(string $constructeurId): array
+    public function __invoke(string $constructeurId): CallToolResult
     {
         $constructeur = $this->constructeurs->find($constructeurId);
 

src/Mcp/Tool/Constructeur/ListConstructeursTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool\Constructeur;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ConstructeurRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'list_constructeurs',
@@ -20,7 +21,7 @@ class ListConstructeursTool
         private readonly ConstructeurRepository $constructeurs,
     ) {}
 
-    public function __invoke(int $page = 1, int $limit = 30, string $search = ''): array
+    public function __invoke(int $page = 1, int $limit = 30, string $search = ''): CallToolResult
     {
         $p = $this->paginationParams($page, $limit);
 

src/Mcp/Tool/Constructeur/UpdateConstructeurTool.php

@@ -8,6 +8,7 @@ use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ConstructeurRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -29,7 +30,7 @@ class UpdateConstructeurTool
         ?string $name = null,
         ?string $email = null,
         ?string $phone = null,
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         $constructeur = $this->constructeurs->find($constructeurId);

src/Mcp/Tool/CustomField/DeleteCustomFieldValueTool.php

@@ -8,6 +8,7 @@ use App\Entity\CustomFieldValue;
 use App\Mcp\Tool\McpToolHelper;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -23,7 +24,7 @@ class DeleteCustomFieldValueTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(string $customFieldValueId): array
+    public function __invoke(string $customFieldValueId): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/CustomField/ListCustomFieldValuesTool.php

@@ -8,6 +8,7 @@ use App\Entity\CustomFieldValue;
 use App\Mcp\Tool\McpToolHelper;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'list_custom_field_values',
@@ -23,7 +24,7 @@ class ListCustomFieldValuesTool
         private readonly EntityManagerInterface $em,
     ) {}
 
-    public function __invoke(string $entityType, string $entityId): array
+    public function __invoke(string $entityType, string $entityId): CallToolResult
     {
         $entityType = strtolower($entityType);
 

src/Mcp/Tool/CustomField/UpsertCustomFieldValuesTool.php

@@ -13,6 +13,7 @@ use App\Entity\Product;
 use App\Mcp\Tool\McpToolHelper;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -30,7 +31,7 @@ class UpsertCustomFieldValuesTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(string $entityType, string $entityId, array $fields): array
+    public function __invoke(string $entityType, string $entityId, array $fields): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/DashboardStatsTool.php

@@ -12,6 +12,7 @@ use App\Repository\SiteRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
 use Mcp\Schema\Content\TextContent;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'get_dashboard_stats',
@@ -28,14 +29,14 @@ class DashboardStatsTool
         private readonly EntityManagerInterface $em,
     ) {}
 
-    public function __invoke(): array
+    public function __invoke(): CallToolResult
     {
         $unresolvedComments = (int) $this->em->createQuery(
             "SELECT COUNT(c.id) FROM App\\Entity\\Comment c WHERE c.status = 'open'"
         )->getSingleScalarResult();
 
-        return [
+        return new CallToolResult(
-            new TextContent(
+            content: [new TextContent(
                 text: json_encode([
                     'machines'           => $this->machines->count([]),
                     'pieces'             => $this->pieces->count([]),
@@ -44,7 +45,7 @@ class DashboardStatsTool
                     'sites'              => $this->sites->count([]),
                     'unresolvedComments' => $unresolvedComments,
                 ], JSON_THROW_ON_ERROR)
-            ),
+            )],
-        ];
+        );
     }
 }

src/Mcp/Tool/Document/DeleteDocumentTool.php

@@ -8,6 +8,7 @@ use App\Mcp\Tool\McpToolHelper;
 use App\Repository\DocumentRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -24,7 +25,7 @@ class DeleteDocumentTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(string $documentId): array
+    public function __invoke(string $documentId): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/Document/ListDocumentsTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool\Document;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\DocumentRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'list_documents',
@@ -28,7 +29,7 @@ class ListDocumentsTool
         private readonly DocumentRepository $documents,
     ) {}
 
-    public function __invoke(string $entityType, string $entityId): array
+    public function __invoke(string $entityType, string $entityId): CallToolResult
     {
         if (!isset(self::ENTITY_FIELDS[$entityType])) {
             $this->mcpError('validation', "Invalid entityType '{$entityType}'. Must be one of: site, machine, composant, piece, product.");

src/Mcp/Tool/EntityHistoryTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool;
 use App\Repository\AuditLogRepository;
 use DateTimeInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -24,7 +25,7 @@ class EntityHistoryTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(string $entityType, string $entityId): array
+    public function __invoke(string $entityType, string $entityId): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_VIEWER');
 

src/Mcp/Tool/Machine/AddMachineLinksTool.php

@@ -16,6 +16,7 @@ use App\Repository\PieceRepository;
 use App\Repository\ProductRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -37,7 +38,7 @@ class AddMachineLinksTool
         private readonly MachinePieceLinkRepository $pieceLinks,
     ) {}
 
-    public function __invoke(string $machineId, array $links): array
+    public function __invoke(string $machineId, array $links): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/Machine/CloneMachineTool.php

@@ -18,6 +18,7 @@ use App\Repository\MachineProductLinkRepository;
 use App\Repository\MachineRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -42,7 +43,7 @@ class CloneMachineTool
         string $name,
         string $siteId,
         string $reference = '',
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         $source = $this->machineRepository->find($machineId);

src/Mcp/Tool/Machine/CreateMachineTool.php

@@ -10,6 +10,7 @@ use App\Repository\ConstructeurRepository;
 use App\Repository\SiteRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -36,7 +37,7 @@ class CreateMachineTool
         string $reference = '',
         string $prix = '',
         array $constructeurIds = [],
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         $site = $this->sites->find($siteId);

src/Mcp/Tool/Machine/DeleteMachineTool.php

@@ -8,6 +8,7 @@ use App\Mcp\Tool\McpToolHelper;
 use App\Repository\MachineRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -24,7 +25,7 @@ class DeleteMachineTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(string $machineId): array
+    public function __invoke(string $machineId): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/Machine/GetMachineTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool\Machine;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\MachineRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'get_machine',
@@ -20,7 +21,7 @@ class GetMachineTool
         private readonly MachineRepository $machines,
     ) {}
 
-    public function __invoke(string $machineId): array
+    public function __invoke(string $machineId): CallToolResult
     {
         $machine = $this->machines->find($machineId);
 

src/Mcp/Tool/Machine/ListMachineLinksTool.php

@@ -10,6 +10,7 @@ use App\Repository\MachinePieceLinkRepository;
 use App\Repository\MachineProductLinkRepository;
 use App\Repository\MachineRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'list_machine_links',
@@ -26,7 +27,7 @@ class ListMachineLinksTool
         private readonly MachineProductLinkRepository $productLinks,
     ) {}
 
-    public function __invoke(string $machineId): array
+    public function __invoke(string $machineId): CallToolResult
     {
         $machine = $this->machines->find($machineId);
         if (null === $machine) {

src/Mcp/Tool/Machine/ListMachinesTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool\Machine;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\MachineRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'list_machines',
@@ -20,7 +21,7 @@ class ListMachinesTool
         private readonly MachineRepository $machines,
     ) {}
 
-    public function __invoke(int $page = 1, int $limit = 30, string $search = ''): array
+    public function __invoke(int $page = 1, int $limit = 30, string $search = ''): CallToolResult
     {
         $p = $this->paginationParams($page, $limit);
 

src/Mcp/Tool/Machine/MachineStructureTool.php

@@ -21,6 +21,7 @@ use App\Repository\MachineProductLinkRepository;
 use App\Repository\MachineRepository;
 use Doctrine\Common\Collections\Collection;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'get_machine_structure',
@@ -37,7 +38,7 @@ class MachineStructureTool
         private readonly MachineProductLinkRepository $machineProductLinkRepository,
     ) {}
 
-    public function __invoke(string $machineId): array
+    public function __invoke(string $machineId): CallToolResult
     {
         $machine = $this->machineRepository->find($machineId);
 

src/Mcp/Tool/Machine/RemoveMachineLinkTool.php

@@ -10,6 +10,7 @@ use App\Repository\MachinePieceLinkRepository;
 use App\Repository\MachineProductLinkRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -28,7 +29,7 @@ class RemoveMachineLinkTool
         private readonly MachineProductLinkRepository $productLinks,
     ) {}
 
-    public function __invoke(string $linkId, string $linkType): array
+    public function __invoke(string $linkId, string $linkType): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/Machine/UpdateMachineLinkTool.php

@@ -11,6 +11,7 @@ use App\Repository\MachineComponentLinkRepository;
 use App\Repository\MachinePieceLinkRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -35,7 +36,7 @@ class UpdateMachineLinkTool
         ?string $referenceOverride = null,
         ?string $prixOverride = null,
         ?int $quantity = null,
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         switch ($linkType) {

src/Mcp/Tool/Machine/UpdateMachineTool.php

@@ -10,6 +10,7 @@ use App\Repository\MachineRepository;
 use App\Repository\SiteRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -38,7 +39,7 @@ class UpdateMachineTool
         ?string $prix = null,
         ?string $siteId = null,
         ?array $constructeurIds = null,
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         $machine = $this->machines->find($machineId);

src/Mcp/Tool/McpToolHelper.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace App\Mcp\Tool;
 
 use Mcp\Schema\Content\TextContent;
+use Mcp\Schema\Result\CallToolResult;
 use RuntimeException;
 use Symfony\Bundle\SecurityBundle\Security;
 
@@ -17,12 +18,11 @@ trait McpToolHelper
         }
     }
 
-    /**
+    private function jsonResponse(array $data): CallToolResult
-     * @return array{TextContent}
-     */
-    private function jsonResponse(array $data): array
     {
-        return [new TextContent(text: json_encode($data, JSON_THROW_ON_ERROR | JSON_UNESCAPED_UNICODE))];
+        return new CallToolResult(
+            content: [new TextContent(text: json_encode($data, JSON_THROW_ON_ERROR | JSON_UNESCAPED_UNICODE))],
+        );
     }
 
     private function mcpError(string $category, string $message): never
@@ -42,10 +42,7 @@ trait McpToolHelper
         return ['page' => $page, 'limit' => $limit, 'offset' => $offset];
     }
 
-    /**
+    private function paginatedResponse(array $items, int $total, int $page, int $limit): CallToolResult
-     * @return array{TextContent}
-     */
-    private function paginatedResponse(array $items, int $total, int $page, int $limit): array
     {
         return $this->jsonResponse([
             'items'     => $items,

src/Mcp/Tool/ModelType/CreateModelTypeTool.php

@@ -9,6 +9,7 @@ use App\Enum\ModelCategory;
 use App\Mcp\Tool\McpToolHelper;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -24,7 +25,7 @@ class CreateModelTypeTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(string $name, string $category, string $code = ''): array
+    public function __invoke(string $name, string $category, string $code = ''): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/ModelType/DeleteModelTypeTool.php

@@ -8,6 +8,7 @@ use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ModelTypeRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -24,7 +25,7 @@ class DeleteModelTypeTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(string $modelTypeId): array
+    public function __invoke(string $modelTypeId): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/ModelType/GetModelTypeTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool\ModelType;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ModelTypeRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'get_model_type',
@@ -20,7 +21,7 @@ class GetModelTypeTool
         private readonly ModelTypeRepository $modelTypes,
     ) {}
 
-    public function __invoke(string $modelTypeId): array
+    public function __invoke(string $modelTypeId): CallToolResult
     {
         $mt = $this->modelTypes->find($modelTypeId);
 

src/Mcp/Tool/ModelType/ListModelTypesTool.php

@@ -8,6 +8,7 @@ use App\Enum\ModelCategory;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ModelTypeRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'list_model_types',
@@ -21,7 +22,7 @@ class ListModelTypesTool
         private readonly ModelTypeRepository $modelTypes,
     ) {}
 
-    public function __invoke(int $page = 1, int $limit = 30, string $category = ''): array
+    public function __invoke(int $page = 1, int $limit = 30, string $category = ''): CallToolResult
     {
         $p = $this->paginationParams($page, $limit);
 

src/Mcp/Tool/ModelType/SyncModelTypeTool.php

@@ -10,6 +10,7 @@ use App\Repository\ModelTypeRepository;
 use App\Service\ModelTypeSyncService;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -33,7 +34,7 @@ class SyncModelTypeTool
         ?array $structure = null,
         bool $confirmDeletions = false,
         bool $confirmTypeChanges = false,
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         if (!in_array($action, ['preview', 'sync'], true)) {

src/Mcp/Tool/ModelType/UpdateModelTypeTool.php

@@ -8,6 +8,7 @@ use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ModelTypeRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -24,7 +25,7 @@ class UpdateModelTypeTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(string $modelTypeId, ?string $name = null, ?string $code = null): array
+    public function __invoke(string $modelTypeId, ?string $name = null, ?string $code = null): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/Piece/CreatePieceTool.php

@@ -10,6 +10,7 @@ use App\Repository\ConstructeurRepository;
 use App\Repository\ModelTypeRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -37,7 +38,7 @@ class CreatePieceTool
         string $prix = '',
         string $modelTypeId = '',
         array $constructeurIds = [],
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         $piece = new Piece();

src/Mcp/Tool/Piece/DeletePieceTool.php

@@ -8,6 +8,7 @@ use App\Mcp\Tool\McpToolHelper;
 use App\Repository\PieceRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -24,7 +25,7 @@ class DeletePieceTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(string $pieceId): array
+    public function __invoke(string $pieceId): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/Piece/GetPieceTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool\Piece;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\PieceRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'get_piece',
@@ -20,7 +21,7 @@ class GetPieceTool
         private readonly PieceRepository $pieces,
     ) {}
 
-    public function __invoke(string $pieceId): array
+    public function __invoke(string $pieceId): CallToolResult
     {
         $piece = $this->pieces->find($pieceId);
 

src/Mcp/Tool/Piece/ListPiecesTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool\Piece;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\PieceRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'list_pieces',
@@ -20,7 +21,7 @@ class ListPiecesTool
         private readonly PieceRepository $pieces,
     ) {}
 
-    public function __invoke(int $page = 1, int $limit = 30, string $search = ''): array
+    public function __invoke(int $page = 1, int $limit = 30, string $search = ''): CallToolResult
     {
         $p = $this->paginationParams($page, $limit);
 

src/Mcp/Tool/Piece/UpdatePieceTool.php

@@ -10,6 +10,7 @@ use App\Repository\ModelTypeRepository;
 use App\Repository\PieceRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -39,7 +40,7 @@ class UpdatePieceTool
         ?string $prix = null,
         ?string $modelTypeId = null,
         ?array $constructeurIds = null,
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         $piece = $this->pieces->find($pieceId);

src/Mcp/Tool/Product/CreateProductTool.php

@@ -10,6 +10,7 @@ use App\Repository\ConstructeurRepository;
 use App\Repository\ModelTypeRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -36,7 +37,7 @@ class CreateProductTool
         string $supplierPrice = '',
         string $modelTypeId = '',
         array $constructeurIds = [],
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         $product = new Product();

src/Mcp/Tool/Product/DeleteProductTool.php

@@ -8,6 +8,7 @@ use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ProductRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -24,7 +25,7 @@ class DeleteProductTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(string $productId): array
+    public function __invoke(string $productId): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/Product/GetProductTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool\Product;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ProductRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'get_product',
@@ -20,7 +21,7 @@ class GetProductTool
         private readonly ProductRepository $products,
     ) {}
 
-    public function __invoke(string $productId): array
+    public function __invoke(string $productId): CallToolResult
     {
         $product = $this->products->find($productId);
 

src/Mcp/Tool/Product/ListProductsTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool\Product;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\ProductRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'list_products',
@@ -20,7 +21,7 @@ class ListProductsTool
         private readonly ProductRepository $products,
     ) {}
 
-    public function __invoke(int $page = 1, int $limit = 30, string $search = ''): array
+    public function __invoke(int $page = 1, int $limit = 30, string $search = ''): CallToolResult
     {
         $p = $this->paginationParams($page, $limit);
 

src/Mcp/Tool/Product/UpdateProductTool.php

@@ -10,6 +10,7 @@ use App\Repository\ModelTypeRepository;
 use App\Repository\ProductRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -38,7 +39,7 @@ class UpdateProductTool
         ?string $supplierPrice = null,
         ?string $modelTypeId = null,
         ?array $constructeurIds = null,
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         $product = $this->products->find($productId);

src/Mcp/Tool/SearchInventoryTool.php

@@ -11,6 +11,7 @@ use App\Repository\PieceRepository;
 use App\Repository\ProductRepository;
 use App\Repository\SiteRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'search_inventory',
@@ -31,7 +32,7 @@ class SearchInventoryTool
         private readonly ConstructeurRepository $constructeurs,
     ) {}
 
-    public function __invoke(string $query, string $types = '', int $limit = 20): array
+    public function __invoke(string $query, string $types = '', int $limit = 20): CallToolResult
     {
         $query = trim($query);
         if ('' === $query) {

src/Mcp/Tool/Site/CreateSiteTool.php

@@ -8,6 +8,7 @@ use App\Entity\Site;
 use App\Mcp\Tool\McpToolHelper;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -31,7 +32,7 @@ class CreateSiteTool
         string $contactPostalCode = '',
         string $contactCity = '',
         string $color = '',
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         $site = new Site();

src/Mcp/Tool/Site/DeleteSiteTool.php

@@ -8,6 +8,7 @@ use App\Mcp\Tool\McpToolHelper;
 use App\Repository\SiteRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -24,7 +25,7 @@ class DeleteSiteTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(string $siteId): array
+    public function __invoke(string $siteId): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

src/Mcp/Tool/Site/GetSiteTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool\Site;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\SiteRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'get_site',
@@ -20,7 +21,7 @@ class GetSiteTool
         private readonly SiteRepository $sites,
     ) {}
 
-    public function __invoke(string $siteId): array
+    public function __invoke(string $siteId): CallToolResult
     {
         $site = $this->sites->find($siteId);
 

src/Mcp/Tool/Site/ListSitesTool.php

@@ -7,6 +7,7 @@ namespace App\Mcp\Tool\Site;
 use App\Mcp\Tool\McpToolHelper;
 use App\Repository\SiteRepository;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'list_sites',
@@ -20,7 +21,7 @@ class ListSitesTool
         private readonly SiteRepository $sites,
     ) {}
 
-    public function __invoke(int $page = 1, int $limit = 30, string $search = ''): array
+    public function __invoke(int $page = 1, int $limit = 30, string $search = ''): CallToolResult
     {
         $p = $this->paginationParams($page, $limit);
 

src/Mcp/Tool/Site/UpdateSiteTool.php

@@ -8,6 +8,7 @@ use App\Mcp\Tool\McpToolHelper;
 use App\Repository\SiteRepository;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -33,7 +34,7 @@ class UpdateSiteTool
         ?string $contactPostalCode = null,
         ?string $contactCity = null,
         ?string $color = null,
-    ): array {
+    ): CallToolResult {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 
         $site = $this->sites->find($siteId);

src/Mcp/Tool/Slot/ListSlotsTool.php

@@ -11,6 +11,7 @@ use App\Entity\PieceProductSlot;
 use App\Mcp\Tool\McpToolHelper;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 
 #[McpTool(
     name: 'list_slots',
@@ -24,7 +25,7 @@ class ListSlotsTool
         private readonly EntityManagerInterface $em,
     ) {}
 
-    public function __invoke(string $entityType, string $entityId): array
+    public function __invoke(string $entityType, string $entityId): CallToolResult
     {
         if ('composant' === $entityType) {
             return $this->listComposantSlots($entityId);
@@ -37,7 +38,7 @@ class ListSlotsTool
         $this->mcpError('validation', "entityType must be 'composant' or 'piece', got '{$entityType}'.");
     }
 
-    private function listComposantSlots(string $composantId): array
+    private function listComposantSlots(string $composantId): CallToolResult
     {
         $pieceSlots = $this->em->createQueryBuilder()
             ->select(
@@ -108,7 +109,7 @@ class ListSlotsTool
         ]);
     }
 
-    private function listPieceSlots(string $pieceId): array
+    private function listPieceSlots(string $pieceId): CallToolResult
     {
         $slots = $this->em->createQueryBuilder()
             ->select(

src/Mcp/Tool/Slot/UpdateSlotsTool.php

@@ -14,6 +14,7 @@ use App\Entity\Product;
 use App\Mcp\Tool\McpToolHelper;
 use Doctrine\ORM\EntityManagerInterface;
 use Mcp\Capability\Attribute\McpTool;
+use Mcp\Schema\Result\CallToolResult;
 use Symfony\Bundle\SecurityBundle\Security;
 
 #[McpTool(
@@ -29,7 +30,7 @@ class UpdateSlotsTool
         private readonly Security $security,
     ) {}
 
-    public function __invoke(array $slots): array
+    public function __invoke(array $slots): CallToolResult
     {
         $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
 

tests/AbstractApiTestCase.php

@@ -108,6 +108,7 @@ abstract class AbstractApiTestCase extends ApiTestCase
         $response = $client->request('POST', '/_mcp', [
             'headers' => [
                 'Content-Type'       => 'application/json',
+                'Accept'             => 'application/json, text/event-stream',
                 'X-Profile-Id'       => $profileId,
                 'X-Profile-Password' => $password,
             ],
@@ -128,6 +129,7 @@ abstract class AbstractApiTestCase extends ApiTestCase
         $client->request('POST', '/_mcp', [
             'headers' => [
                 'Content-Type'       => 'application/json',
+                'Accept'             => 'application/json, text/event-stream',
                 'X-Profile-Id'       => $profileId,
                 'X-Profile-Password' => $password,
                 'Mcp-Session-Id'     => $sessionId,
@@ -149,6 +151,7 @@ abstract class AbstractApiTestCase extends ApiTestCase
         $response = $session['client']->request('POST', '/_mcp', [
             'headers' => [
                 'Content-Type'       => 'application/json',
+                'Accept'             => 'application/json, text/event-stream',
                 'X-Profile-Id'       => $session['profileId'],
                 'X-Profile-Password' => $session['password'],
                 'Mcp-Session-Id'     => $session['sessionId'],
@@ -164,7 +167,24 @@ abstract class AbstractApiTestCase extends ApiTestCase
             ]),
         ]);
 
-        $data = $response->toArray(false);
+        $raw  = $response->getContent(false);
+        $data = json_decode($raw, true);
+
+        if (null === $data) {
+            // SSE format: parse "data: {...}" lines
+            foreach (explode("\n", $raw) as $line) {
+                if (str_starts_with($line, 'data: ')) {
+                    $parsed = json_decode(substr($line, 6), true);
+                    if ($parsed && (isset($parsed['result']) || isset($parsed['error']))) {
+                        $data = $parsed;
+
+                        break;
+                    }
+                }
+            }
+        }
+
+        $data ??= [];
 
         if (isset($data['result']['content'][0]['text'])) {
             $data['_parsed'] = json_decode($data['result']['content'][0]['text'], true);