Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.312,
Internal ChangesSection of the release
What
A tool call is a request from Claude to use one of its tools, such as reading a file or running a command. While Claude's reply is still arriving piece by piece, Claude Code used to run an extra step as soon as a tool call began. It no longer does.
Why
One early side effect at the start of a tool call is gone. The tool call itself still runs as before.
