ResearchResearch paperAgents & Tool Use · Safety & Alignment · Reasoning & Planning1 source · Oct 5, 2026

What Did the Agent Actually Do? Evidence-Grounded Oversight for Long-Horizon Agents

To support these judgments, we propose the Evidence-Grounded Behavior Graph (EBG), a training-free method that groups source-linked evidence into behaviors and organizes their relationships into a graph.

Key points

  • As agents take on long-horizon tasks, users shift from making individual decisions to overseeing autonomous execution.
  • Yet the volume of agent activity and the fragmentation of supporting evidence make it difficult to determine which decisions warrant user verification.
  • We study monitors that identify consequential decisions and locate evidence to help users assess their implications.
  • We introduce AgentMonBench, a software-engineering benchmark comprising three subsets that cover two complementary dimensions: alignment between requirements and behavior, and awareness of consequential autonomous decisions for verification.

Sources (1)

  • [1]What Did the Agent Actually Do? Evidence-Grounded Oversight for Long-Horizon Agents
    Hugging Face Daily Papers · Oct 5, 12:00 AM
    To support these judgments, we propose the Evidence-Grounded Behavior Graph (EBG), a training-free method that groups source-linked evidence into behaviors and organizes their relationships into a graph.
    As agents take on long-horizon tasks, users shift from making individual decisions to overseeing autonomous execution.

Extractive summary: sentences quoted from the sources.

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