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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.321 ·

Stricter policy checks before MCP servers are reused or refreshed

Claude Code now rechecks SDK MCP servers against policy before reuse, refreshes tools only for allowed servers, and sorts private addresses by type

You'll notice Improvements
JSON All of v2.1.321
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.321,
ImprovementsSection of the release

Unclear Which servers the new checks would turn away, and what you would see when that happens, is not stated.

What

MCP servers are connections that give Claude extra tools. Claude Code now checks them more strictly:

  • SDK servers (ones supplied by the program driving Claude Code) are checked against policy again before they are reused.
  • When reconnecting, Claude Code only fetches the tool list again for servers that pass an admission check.
  • The check for private network addresses now says what kind of address it is, such as link_local or carrier_nat, instead of a plain yes or no.
Why

Policy on which MCP servers may be used is enforced in more places.

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 doubtWhich servers the new checks would turn away, and what you would see when that happens, is not stated.

See this entry in the whole of v2.1.321 →

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