fix: relogin auth MCP Server after expired auth

[linux-fan-dave]

Fixes #16319

Pull Request

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Documentation changes belong in the LibreChat documentation repository.

Summary

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Type of change

• Bug fix
• Feature
• Refactor
• Performance improvement
• Breaking change
• Documentation
• Translation
• Tests / tooling / CI

Testing

Tested environments/configuration:

Automated tests:

Screenshots / recordings

Risk / compatibility

Checklist

• I reviewed my own changes
• Relevant tests have been added or updated
• Existing relevant tests pass
• The change does not introduce new warnings or errors
• User-facing or complex behavior is documented where necessary
• Required dependency changes have been merged/published
• Required documentation PR:

[github-actions]

👋 Thanks for the contribution! LibreChat merges all changes into dev first — main only moves at release time — so this pull request's base branch was switched from main to dev automatically.

Nothing is needed from you; your commits, reviews and discussion are unchanged. If the diff now shows files you did not touch, rebase onto dev:

git remote add upstream https://github.com/LibreChat-AI/LibreChat.git
git fetch upstream dev
git rebase upstream/dev
git push --force-with-lease

Maintainers: apply the target: main label and restore the base branch if this one genuinely belongs on main.

[danny-avila]

Thanks for picking this up. The fix landed in #16323: when MCP OAuth or OpenID recovery cannot refresh a credential, the tool loader now surfaces the typed credential failure instead of dropping it silently. Recoverable credentials still refresh in the background as before.

Closing this in favor of it, and #16319 is closed as well. If you still see a silent failure on the latest dev image, please reopen #16319 with your LibreChat version and which credential expired, and we'll take it from there.