You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
SubagentsArea: what it touches
In DevelopmentKind: in v2.1.227,
In DevelopmentSection of the release
What
When a tool is unavailable specifically because the coordinator agent cannot use it, the explanation now says so and tells Claude to run it from a worker instead, rather than reporting a plain unavailability. It only fires when the delegation tool is present and CLAUDE_CODE_SIMPLE is unset; the rest of the message is assembled from a template.
Evidence
. ${e} is not available to you as the coordinator \u2014 run it from a worker via the ${mi} tool instead.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
