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

Claude Code v2.1.305 ·

MCP tool names with only a server part now pass a validation check

A check on MCP tool names now accepts mcp__server on its own, not only the full mcp__server__tool form

You'll notice Improvements
JSON All of v2.1.305
You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.305,
ImprovementsSection of the release

Unclear It is not clear which setting or field this name check applies to.

What

MCP servers are outside programs that give Claude Code extra tools, and their tools are named like mcp__server__tool. One check on these names used to require both the server and the tool part. It now accepts any name starting with mcp__, so mcp__server on its own passes.

Why

Wherever this check applies, you can now refer to a whole MCP server at once instead of one tool at a time.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not clear which setting or field this name check applies to.

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