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Sweep 08 Oct 2026 · 18:53Z Build v2.1.295 516 read Stable v2.1.286 Latest v2.1.295 Next v2.1.295 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.290 ·

MCP tools now carry details about the server they come from

Tools that come from an MCP server now carry information about that server inside Claude Code

Under the hood Internal Changes
JSON All of v2.1.290
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 v2.1.290,
Internal ChangesSection of the release

Unclear It is not clear which parts of Claude Code read this server information or whether anything visible changes because of it.

What

MCP (Model Context Protocol) is a way to plug outside tools into Claude Code from a separate program called an MCP server. Each tool that comes from an MCP server now carries a record of information about that server, held alongside the tool's own definition. This field was not there before.

Why

Other parts of Claude Code can now tell which MCP server a tool belongs to by looking at the tool itself.

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 parts of Claude Code read this server information or whether anything visible changes because of it.

See this entry in the whole of v2.1.290 →

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