You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Tool CallsArea: what it touches
ImprovementsKind: in v2.1.323,
ImprovementsSection of the release
What
A tool call is a single action the model asks Claude Code to take, such as running a command. When one ends with no result, for example after an interruption, the model now gets one of two messages:
"As far as this session knows, this call did not run."
"This call has no result. It may not have run, or not completely."
Claude Code then adds advice either to call it again or to check first, unless that advice is switched off for the case at hand.
Why
What the model is told after an interrupted action shapes whether it repeats it. The second wording warns that the action may have partly happened, so the model is steered to check before running it again.
