The refusal-reason map for remote, cross-machine tool calls gained several new cases beyond the prior generic ones: stale, queue_full, rate_limited, duplicate_call, withdrawn, and result_lost, each with a human-readable explanation (for example queue_full reports "that machine was at one of its capacity limits"). These surface when a call to another machine in a session is refused.
More granular refusal reasons for remote/cross-machine tool calls
Refused cross-machine tool calls now explain why: stale, queue full, rate limited, duplicate, withdrawn or result lost.
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Remote Tool ServingArea: what it touches
ImprovementsKind: in v2.1.257,
ImprovementsSection of the release