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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 v2.1.246 ·

Third-party MCP server and tool names are replaced with a placeholder in telemetry

MCP servers you added yourself are reported as "custom" in usage data, with tool names withheld.

You'll notice Improvements
JSON All of v2.1.246
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
TelemetryArea: what it touches
ImprovementsKind: in v2.1.246,
ImprovementsSection of the release
What

When a tool call from an MCP server is attributed in usage reporting, the server name is now sent as the literal "custom" unless that server is on a per-session list of servers marked as first-party. The tool name is withheld the same way. Servers you add yourself are therefore no longer named in reporting.

Details
  • The list is filled in at tool-call time and only when a first-party marker is present on the call, so there is no setting to opt a server in or out.
  • Plugin loading now records which marketplace each plugin came from, keyed by name and marketplace, with a counter that discards registrations left over from a previous load.
Evidence

loggableMcpServers

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

See this entry in the whole of v2.1.246 →

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