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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.248

The MCP tool-refresh tool now tells the model when to use it

You'll notice
Useful3 Signal2
MCP

Claude now knows when to refresh MCP tool lists, such as after a server reconnects.

What

The tool that re-queries connected MCP servers for their tool lists ships a written description: use it when a device the user says is now open is missing, when an expected tool is absent, or when a server's connection has recovered.

Details
  • One sentence varies by surface: where MCP tools run inside the REPL the description says refreshed tools become callable there, otherwise that they are available immediately.
  • The choice is made by a runtime function call, not by a settings key.
Evidence

Re-queries the tool list of connected MCP servers and updates the set of available tools, reporting which tools were added or removed.

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.248 →