{"type":"post","id":"paper-proposes-prefix-executability-to-score-tool-using-117218","slug":"paper-proposes-prefix-executability-to-score-tool-using-117218","title":"Paper proposes prefix executability to score tool-using agents on whether every step could actually run","description":"A NeurIPS 2026 paper proposes “prefix executability,” an evaluation method for tool-using agents that asks whether every intermediate tool-call step could actually run, rather than judging only the final outcome.","retrieval_nugget":"A NeurIPS 2026 paper proposes “prefix executability,” an evaluation method for tool-using agents that asks whether every intermediate tool-call step could actually run, rather than judging only the final outcome. For AI builders, it offers a more diagnostic signal for evaluations, regression tests, and failure analysis.","published_at":"2026-10-31","updated_at":"2026-10-31","record_date":"2026-10-31","date_kind":"published_at","topics":["agent-loops","automation"],"entities":["Prefix Executability","BFCL-v3","ToolSandbox","tau^3-bench","Amir H. Rezaeian","Dan Roth"],"related_patterns":["goal-scoped-loops-replace-manual-continuation"],"novelty_label":"new_fact","what_changed":"Introduces a specific tool-agent evaluation protocol with prefix-level metrics and benchmark results showing final-success rankings can mask invalid execution trajectories.","prior_refs":["memory:0c363213-84b0-86a0-a53b-6d268e49ffff","memory:5845035a-36be-80e2-a75e-31758f27d26b","memory:043a39a8-b593-8e66-aefe-552104ba3849"],"source_url":"https://arxiv.org/abs/2610.40444","source_urls":["https://arxiv.org/abs/2610.40444"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:paper-proposes-prefix-executability-to-score-tool-using-117218","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/paper-proposes-prefix-executability-to-score-tool-using-117218/","markdown":"https://newruntime.com/posts/paper-proposes-prefix-executability-to-score-tool-using-117218.md","json":"https://newruntime.com/posts/paper-proposes-prefix-executability-to-score-tool-using-117218.json"},"next_reads":[{"type":"topic","path":"/topics/agent-loops/","url":"https://newruntime.com/topics/agent-loops/","title":"Agent Loops","reason":"Explore the agent-loops topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/agent-loops.md","json_url":"https://newruntime.com/topics/agent-loops.json"},{"type":"topic","path":"/topics/automation/","url":"https://newruntime.com/topics/automation/","title":"Automation","reason":"Explore the automation topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/automation.md","json_url":"https://newruntime.com/topics/automation.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/source-ledger.json","url":"https://newruntime.com/source-ledger.json","title":"Source Ledger","reason":"Inspect the public source evidence graph.","media_type":"application/json"}]}