fix(server): preserve explicit tool listChanged capability - #2625
Open
LizunovSergey wants to merge 2 commits into
Open
fix(server): preserve explicit tool listChanged capability#2625LizunovSergey wants to merge 2 commits into
LizunovSergey wants to merge 2 commits into
Conversation
🦋 Changeset detectedLatest commit: 15cf0fa The changes in this PR will be included in the next version bump. Not sure what this means? Click here to learn what changesets are. Click here if you're a maintainer who wants to add another changeset to this PR |
commit: |
LizunovSergey
marked this pull request as ready for review
August 8, 2026 19:02
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
tools.listChanged: falsevalue when the first tool is registeredMcpServercan merge its default without overwriting caller configurationlistChanged: truedefault when no value is providedRoot cause
McpServer.setToolRequestHandlers()unconditionally registeredtools.listChanged: true, and the capability merge allowed that internal default to overwrite the constructor-provided value. The v2 server already reads the current capability before applying the default; this brings the same tool behavior tov1.x.Closes #2622.
Validation
npx vitest run test/server/mcp.test.ts(236 passed)npm run typechecknpm run lintAI assistance disclosure: Codex was used to help investigate and implement this change. I reviewed the diff and validated the code and tests locally.