Author

Yi-Chao Gao

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Preprint Sep 2026

JEV as a Judge for Agent Trace Security: An Empirical Comparison with Generative LLM Judges

Security evaluation of tool-using agents requires judging actions in context, yet generative judges add latency, explanation overhead, and output-validation failures. We study whether JEV, a typed decision model, offers a useful alternative for retrospective trace classification. We evaluate JEV and four generative jud...

Zhi-Qiang Wang, Yi-Chao Gao · 2 citations · ⚡1

Preprint Aug 2026

What Guides the Agent? Adjudicating Unauthorized Behavior via Localizing Behavior-Guiding Instructions

This work proposes Attnlocate, a runtime framework for fine-grained localization of context spans that genuinely influence tool-calling decisions, i.e., behavior-guiding instructions, and designs a multi-head, multi-layer attention aggregation scheme to construct a token-level feature space tailored for object detectio...

Yi-Chao Gao, Yumo Zhang, Yunhao Yao et al. · 1 citation