You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.309,
ImprovementsSection of the release
Unclear It is not stated what causes one MCP server's tools to be replaced by another's.
What
MCP servers are outside programs that give Claude Code extra tools. When a server's tools are taken away, Claude Code tells the model why, using reasons such as disabled, switched off or not configured. There is now another reason: the tools were replaced in this session by the tools of a named MCP server, and the model should use those instead.
Why
If one server's tools are swapped for another's partway through a session, Claude knows where the tools went instead of failing to find 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 doubtIt is not stated what causes one MCP server's tools to be replaced by another's.
