Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.224,
Internal ChangesSection of the release
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.
