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Evaluating long-running agents is the assessment of systems that pursue goals across extended sequences of reasoning, tool use, state changes, or elapsed time. Duration alone is not a quality measure: an evaluation must define the task outc

Idempotency and recovery in agent tool calls is the practice of resuming or retrying an interrupted tool operation without silently duplicating its external effects or misreporting an uncertain outcome as success or failure. It combines an

Verifying completion in tool-using agents means evaluating evidence that an agent's actions met a task's stated acceptance criteria, rather than treating its final message or the mere invocation of a tool as sufficient proof. This article a

Idempotency keys At a glance Property Details What it is A client-chosen identifier that lets a server recognise retries and apply a documented duplicate-request policy within a defined scope and retention window Underlying idea Idempotent