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Sweep 12 Nov 2026 · 23:00Z Build v2.1.323 540 read Stable v2.1.311 Latest v2.1.323 Next v2.1.323 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.323 ·

MCP server details now list tools Claude was not given, and why

The MCP server detail view now names tools withheld from Claude because the Anthropic API would reject their input format

You'll notice Improvements
JSON All of v2.1.323
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.323,
ImprovementsSection of the release
What

MCP servers are add-ons that give Claude extra tools. Each tool describes the input it expects, and the Anthropic API rejects some of those descriptions. Tools like that are not given to Claude. The detail view for an MCP server now has a panel for them:

  • It says how many tools Claude was not given, and why.
  • It names each one.
  • It tells you to choose Reconnect once the server is fixed.

If the list is long, it is cut short to fit your terminal window.

Why

Before, these tools just did not appear and nothing explained why. Now you can see which ones are missing and what to do once the server is fixed.

See this entry in the whole of v2.1.323 →

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