modelcontextprotocol / modelcontextprotocol/typescript-sdk

Question: Tool list changed notification

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documentation good first issue P3 potentially close question
Dominant language
TypeScript
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Description

https://modelcontextprotocol.io/specification/2025-06-18/server/tools#list-changed-notification

Does the SDK support this feature?

When we deployed a newer version of the Context7 MCP server with new tool parameters we had a bunch of users reporting issues. Would love to use this feature in the future to prevent such cases.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading the linked MCP specification section on the tools/list_changed notification, then inspect the TypeScript SDK's client and server support for that feature. Confirm whether the SDK already supports it and document the missing scope needed to prevent clients from using stale tool parameters.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript
Domain
api
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
38/100

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