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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.221 ·

New MCP policy-predicate telemetry for allowedMcpServers matching

Claude now tracks whether your allowed-MCP-server rules could actually be evaluated.

Under the hood Internal Changes
JSON All of v2.1.221
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.221,
Internal ChangesSection of the release
What

Matching a server against allowedMcpServers now reports, once per session, whether the predicate could be evaluated.

Details
  • A successful match reports "ok".
  • Unresolved variables in a policy command or URL report "missing_policy_var".
  • An unsafe URL expansion reports "unsafe_expansion".
  • All reported under the metric name mcp_policy_predicate.
Evidence

mcp_policy_predicate

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

Read from
Names in the bundleallowedMcpServers

See this entry in the whole of v2.1.221 →

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