ResearchResearch paperLarge Language Models · Agents & Tool Use1 source · Oct 15, 2026

Explore Separately, Adopt Selectively: Execution-Guided Tool Use over Large Tool Libraries

Large language model agents must discover relevant tools from large libraries, e.g., thousands of tools, as new needs arise during task execution.

Key points

  • To address this, we present BRIA (BRanch-Inspect-Adopt), a simple yet effective agent that temporarily isolates candidate investigations in separate branches.
  • Each branch retrieves and executes tools to investigate its candidate; a task agent inspects the resulting execution evidence and adopts only useful results into its continuing trajectory.
  • BRIA retrieves additional tools as new capability needs arise during task execution.
  • We evaluate BRIA on PlanBench-XL and MCP-Atlas using a shared pool of 1897 tools, three language models, and static and adaptive retrieval baselines.

Sources (1)

  • [1]Explore Separately, Adopt Selectively: Execution-Guided Tool Use over Large Tool Libraries
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 15, 09:56 PM
    Large language model agents must discover relevant tools from large libraries, e.g., thousands of tools, as new needs arise during task execution.
    To address this, we present BRIA (BRanch-Inspect-Adopt), a simple yet effective agent that temporarily isolates candidate investigations in separate branches.

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  5. Oct 15, 2026Trajectory-Level Speculation with Semantic Verification for Tool-Using Agents
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