feat(mcp): enable structured output for nx_workspace and nx_project_details

[MaxKless]

this will start setting us up for a future where programmatic tool calling etc are the default.

[nx-cloud]

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Command	Status	Duration	Result
nx affected --targets=lint,test,build,e2e-ci,ty...	❌ Failed	6m 24s	View ↗
nx-cloud record -- yarn nx sync:check	✅ Succeeded	4s	View ↗
nx-cloud record -- yarn nx run-many -t ktfmtFormat	✅ Succeeded	2m 25s	View ↗
nx run-many -t ktfmtFormat	✅ Succeeded	2m 16s	View ↗
nx-cloud record -- yarn nx format:check --verbose	✅ Succeeded	1m 18s	View ↗

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☁️ Nx Cloud last updated this comment at 2025-12-15 15:39:01 UTC

[nx-cloud]

Nx Cloud is proposing a fix for your failed CI:

These changes fix the test failures caused by migrating to the new registerTool API. We updated the test mocks to include the registerTool method and modified the output schemas to use .passthrough() on validators, allowing the structured output to accept additional properties from Nx plugins while maintaining type safety for core fields.

We verified this fix by re-running nx-mcp-server:test, nx-mcp-e2e:e2e-ci--src/nx-project-details-pagination.test.ts.

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