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>
- 5 tools each: list, get, create, update, delete
- McpToolHelper extracted to AbstractApiTestCase for reuse
- DashboardStatsToolTest simplified to use base helpers
- 22 MCP tests pass
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>