Author

Fei-You Guo

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Preprint Aug 2026

SilentProbe: Measuring Silent Failure in Production APIs Used as Agent Tools

An LLM agent calling a production API cannot distinguish a query that matched nothing from a query the server did not understand, and what predicts which one occurred, and what it does to the agent.

Zong-Rong Li, Sheng-Kun Ye, Fei-You Guo et al. · 2 citations