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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 v2.1.224

MCP telemetry is rate limited and tool names bucketed

Under the hood
Useful1 Signal2
MCP

MCP telemetry now drops events past a rate limit and reports how many were dropped.

What

Forwarded events for MCP-style tools now pass through a sliding window per event and server; over the limit, events are dropped and counted, and the next event that gets through reports how many were dropped since the last one.

Details
  • The window map is size-bounded and evicts its oldest key.
  • Any tool name beginning skill__ is reported as "skill", and feature names starting tool_skill_ collapse to "tool_skill", except tool_skill_tool.
  • A denylist of fields is stripped from every payload before it is sent.
Evidence

droppedSinceLastForward

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

See this entry in the whole of v2.1.224 →