[go165]

Summary

• remove the invalid blob content type from read_media_file output schema
• return a tool error for non-image/audio files instead of emitting a non-spec content block
• add integration coverage for image success and non-media rejection

Fixes #4029

Validation

• npm exec --workspace src/filesystem -- tsc --noEmit
• npm run --workspace src/filesystem build
• npm exec --workspace src/filesystem -- vitest run __tests__/structured-content.test.ts --coverage=false
• git diff --check

Note: validation used temporary symlinks to the existing local node_modules directories from the main checkout; no new install was run.

[cliffhall]

Thank you for this pull request, and apologies for the long wait for a response.

Since it was opened, the reference servers have been rebuilt for the 2026-07-28 MCP specification (#4857) and released as v2 (2.0.0 on npm for the TypeScript servers, 2026.10.19 on PyPI for the Python servers). The code this PR changes has been replaced, and the behavior it addresses has either been fixed in v2 or no longer exists in the same form.

This is not a judgment on the change or on you; it's a consequence of the code it targets having been replaced. If the problem still happens on v2, please open a fresh issue with the version you're running and steps to reproduce. Note that this repository now accepts contributions as issues rather than pull requests from anyone but its maintainers; see CONTRIBUTING.md.

This is part of the backlog triage in #4875.