You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Tool SearchArea: what it touches
ImprovementsKind: in v2.1.323,
ImprovementsSection of the release
What
Tool search is how Claude finds and loads tools that are held back until needed. MCP servers are outside programs that give Claude extra tools. When a search runs, Claude Code used to always try to reconnect to MCP servers. It now does this only for failed servers that match the search, and the attempt is timed.
Other changes:
The message telling Claude a tool is already loaded, such as "Already available in this conversation", now varies in wording.
Replacing an MCP tool's description of its inputs now also works for some tools picked out by name.
The ToolSearch tool's own description is unchanged in this release.
Why
In practice, searching for tools no longer tries to reach every MCP server each time.
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeImproved ToolSearch to say when a tool Claude searched for by its short name is already available, instead of only reporting no match
