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0.21.0

modelcontextprotocol/inspector0.21.0Feb 24, 2026by cliffhall

AI Summary

Feature release with UI enhancements, OAuth improvements, and schema handling fixes. Adds tool annotations display, improved enum handling in anyOf schemas, and OAuth tenant suffix support.

Key Highlights

  • Display tool title field in Inspector UI
  • Display tool annotations in Tools tab
  • Enhanced resolution and enum handling in anyOf schemas
  • Added OAuth tenant suffix support
  • Added 'Run as Task' checkbox display on Tools Tab

New Features

  • Tool annotations display in Tools tab
  • OAuth tenant suffix in oauth flow

Full Release Notes

## What's Changed
* Bump actions/setup-node from 4 to 6 by @dependabot[bot] in https://github.com/modelcontextprotocol/inspector/pull/1057
* Bump actions/upload-artifact from 4 to 6 by @dependabot[bot] in https://github.com/modelcontextprotocol/inspector/pull/1058
* Bump actions/attest-build-provenance from 2 to 3 by @dependabot[bot] in https://github.com/modelcontextprotocol/inspector/pull/1059
* Bump actions/cache from 4 to 5 by @dependabot[bot] in https://github.com/modelcontextprotocol/inspector/pull/1060
* Bump actions/github-script from 7 to 8 by @dependabot[bot] in https://github.com/modelcontextprotocol/inspector/pull/1061
* fix: display tool title field in Inspector UI by @olaservo in https://github.com/modelcontextprotocol/inspector/pull/1054
* Bump actions/checkout from 4 to 6 by @dependabot[bot] in https://github.com/modelcontextprotocol/inspector/pull/1079
* fix: enhance  resolution and enum handling in anyOf schemas by @Edison-A-N in https://github.com/modelcontextprotocol/inspector/pull/901
* fix: include LICENSE file in published npm packages by @olaservo in https://github.com/modelcontextprotocol/inspector/pull/1055
* feat(client): display tool annotations in Tools tab by @olaservo in https://github.com/modelcontextprotocol/inspector/pull/1066
* Bump qs from 6.14.1 to 6.14.2 in the npm_and_yarn group across 1 directory by @dependabot[bot] in https://github.com/modelcontextprotocol/inspector/pull/1088
* fix: add missing tool result to AppsRenderer by @infoxicator in https://github.com/modelcontextprotocol/inspector/pull/1075
* Update SECURITY.md to use GitHub Security Advisories by @localden in https://github.com/modelcontextprotocol/inspector/pull/1097
* oauth: add tenant suffix to oauth flow by @howardjohn in https://github.com/modelcontextprotocol/inspector/pull/1096
* chore(deps): bump the npm_and_yarn group across 1 directory with 2 updates by @dependabot[bot] in https://github.com/modelcontextprotocol/inspector/pull/1106
* Manage display of "Run as Task" checkbox on Tools Tab by @cliffhall in https://github.com/modelcontextprotocol/inspector/pull/1072
* chore: bump version to 0.21.0 by @Copilot in https://github.com/modelcontextprotocol/inspector/pull/1112

## New Contributors
* @Edison-A-N made their first contribution in https://github.com/modelcontextprotocol/inspector/pull/901
* @infoxicator made their first contribution in https://github.com/modelcontextprotocol/inspector/pull/1075
* @localden made their first contribution in https://github.com/modelcontextprotocol/inspector/pull/1097

**Full Changelog**: https://github.com/modelcontextprotocol/inspector/compare/0.20.0...0.21.0