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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.

← All of v2.1.233 Home All releases ←olderv2.1.232 v2.1.234newer→
Claude Code v2.1.233

Subagents can no longer refresh the MCP tool list

You'll notice
Useful2 Signal2
MCP

Subagents can no longer refresh the MCP tool list and are told to finish with what they have.

What

The MCP tool-list refresh tool joined the set of tools withheld from subagents. A subagent that calls it gets the standard refusal telling it to finish with the tools it has.

Details
  • The refusal text is the existing shared one, so no new message shape.
  • Only subagents are affected; the main session can still refresh MCP tools.
Evidence

is not available inside subagents. Complete the task with the tools provided and return findings to the orchestrator.

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.233 →