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abstract indexed · arXiv 2610.11514 · updated 2026-10-18

SSCBench: Evaluating the Evidential Validity of Fault-Injection Tests for Tool-Using LLM Agents

First page of SSCBench: Evaluating the Evidential Validity of Fault-Injection Tests for Tool-Using LLM Agents
From the original paper · arXiv 2610.11514Page 1. Select the image to read the PDF.

The method replaces reporting raw fault-adoption rates from fault-injection tests of tool-using agents with a measurement protocol that records whether counterevidence to an injected fault could become visible before the agent first relies on the affected fact, and whether the execution actually realized that condition. It costs additional trajectory instrumentation and temporal annotation of observation visibility and first-use events, plus benchmark construction or adaptation effort (the authors instantiated it over 1,191 faulted executions in two tau-bench environments). It can fail in that automated trajectory analysis recovers adoption without reliably recovering the first faulty-reliance event, so temporal diagnosis may require manual annotation, and conclusions remain tied to the specific fault operators and environments studied.

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Why it was shortlisted

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recommendation
adopt
research area
agent evaluation
technical change
Evidential validity protocol for fault-injection evaluation
published
2026-10-08

Any team already running or planning fault-injection reliability tests on tool-using agents can adopt this reporting discipline at negligible compute cost, and it directly prevents misinterpreting adoption rates as failures when timely counterevidence was never available.

About the technical core

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    The method replaces reporting raw fault-adoption rates from fault-injection tests of tool-using agents with a measurement protocol that records whether counterevidence to an injected fault could become visible before the agent first relies on the affected fact, and whether the execution actually realized that condition. It costs additional trajectory instrumentation and temporal annotation of observation visibility and first-use events, plus benchmark construction or adaptation effort (the authors instantiated it over 1,191 faulted executions in two tau-bench environments). It can fail in that automated trajectory analysis recovers adoption without reliably recovering the first faulty-reliance event, so temporal diagnosis may require manual annotation, and conclusions remain tied to the specific fault operators and environments studied.

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quality

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compute and memory

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latency

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operations

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software compatibility

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data and training

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Provisional research brief updated 2026-10-18. Paperraft has not reproduced this experiment.

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arXiv 2610.11514

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