You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.301,
ImprovementsSection of the release
What
MCP servers are add-on programs that give Claude Code extra tools. In safe, hermetic and enterprise modes, Claude Code filters the MCP servers it is given against an allowlist or policy. Before, this filtering reported only the servers it kept, the ones it dropped and a reason.
It now also produces notes about servers it kept anyway. The notes say two things:
MCP servers that Claude Code adds to its own remote sessions are not removed by the allowlist.
Listing them in deniedMcpServers in managed settings removes them.
Why
Administrators can now see why a server survived an allowlist and how to block it if they want to.
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeSelf-hosted runner: Fixed sessions started from Slack being unable to find or attach a repository when managed settings restrict MCP…
