What
MCP servers are outside programs that give Claude extra tools and instructions. Until now, as soon as a server's tools or instructions went missing, Claude Code told the model they had been removed. Claude Code now has a hold for this. When the hold is on, tools and instructions from a server that is reconnecting or still starting up are not reported as removed. Tools that come back after the hold are announced again as re-added.
Why
This is meant to stop Claude losing access to MCP tools during a brief reconnect, which could otherwise make it act as if those tools no longer exist.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
What turns the hold on is not known.