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Proof-of-Use: Mitigating Tool-Call Hacking in Deep Research Agents

Ma, Shengjie et al.
arXiv (All) · Papers
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artificial-intelligence
While reinforcement learning (RL) enhances their ability to plan and reason across retrieval steps, we identify a critical failure mode in this setting: Tool-Call Hacking. Unlike execution-based tools (e.g., code or math), whose effects are directly observable, the weak observability of causal depen
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