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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.239 ·

MCP servers now report how many tools were dropped for bad schemas

MCP servers now tell you how many tools were dropped for malformed schemas.

You'll notice Improvements
JSON All of v2.1.239
You'll noticeTier: how much it should matter to you
4Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.239,
What probably matters to youSection of the release
What

When an MCP server offers tools whose input schemas are malformed, you now get a line saying how many tools were excluded, instead of those tools quietly not appearing.

Details
  • A new per-server count message sits alongside the existing message that names the individual server and tool.
  • Produced from the same place that handles the server's dropped-tool notices.
Evidence

tools excluded (invalid input schema)

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

See this entry in the whole of v2.1.239 →

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