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