# Prefix Executability: Evaluating Tool-Using Agents Beyond Final Success

Source: https://arxiv.org/abs/2610.40444
Published: 2026-10-29
Status: unreviewed source report

## Source excerpt (up to 25 words)

> Tool-use benchmarks often score agents by final task success, but terminal outcomes can obscure whether the intermediate tool-call trajectory was executable. We propose prefix executability

## Review question

Compare accepted end-to-end outcomes, tool permissions, intervention rate, recovery behavior and total cost on the same workload. A polished demo does not establish unattended reliability.

No independent proof check or claim of peer review.