Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SDKArea: what it touches
Internal ChangesKind: in v2.1.301,
Internal ChangesSection of the release
Unclear What skipping SDK-supplied servers here changes for a person using them is not clear.
What
MCP servers are add-ons that give Claude extra tools. Some are added while Claude Code is running. When Claude Code applies rules to those servers, it now skips any supplied by a program built on the Agent SDK, Anthropic's kit for running Claude Code from your own code.
Why
This changes which servers added while Claude Code runs have policy rules applied to them.
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 doubtWhat skipping SDK-supplied servers here changes for a person using them is not clear.
