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DeepStress: Stress-Testing Deep Search Agents

Research Agents & Tool Use

Merged summary

TL;DR — DeepStress is a stress-testing framework that probes how robust deep search agents are when fed poor-quality evidence, revealing failure modes that realistic benchmarks rarely expose. It matters because real-world retrieval-augmented agents routinely encounter unreliable documents.

  • Replaces an agent's retrieval module with a controlled synthetic environment to tune the frequency of challenging evidence.
  • Varies three document-reliability dimensions: trustworthiness, relevance, and factuality.
  • Evaluated on HotpotQA and BrowseCompPlus, finding agents differ substantially in handling unreliable information.
  • Proposes new metrics capturing system outcomes and the interplay between parametric (internal) and retrieved knowledge.

Sources (1)

DeepStress: Stress-Testing Deep Search Agents

arXiv cs.CL Ismael Rousseau, Geraldine Damnati, Frederic Bechet 2026-07-15 arXiv:2607.13920

TL;DR — DeepStress is a stress-testing framework that probes how robust deep search agents are when fed poor-quality evidence, revealing failure modes that realistic benchmarks rarely expose. It matters because real-world retrieval-augmented agents routinely encounter unreliable documents.

  • Replaces an agent's retrieval module with a controlled synthetic environment to tune the frequency of challenging evidence.
  • Varies three document-reliability dimensions: trustworthiness, relevance, and factuality.
  • Evaluated on HotpotQA and BrowseCompPlus, finding agents differ substantially in handling unreliable information.
  • Proposes new metrics capturing system outcomes and the interplay between parametric (internal) and retrieved knowledge.
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