Plan or Retrieve First? A Scale Study of Tool Discovery Architectures
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Tool-augmented LLM agents discover relevant APIs from large registries before planning execution, yet finite context windows prohibit injecting all tool definitions into a single prompt. The dominant approach, which we term Retrieve-then-Plan (RtP), embeds the user query and retrieves similar tools via approximate nearest-neighbor search. …
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- October 15, 2026 20:01
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plan-retrieve-tool-discovery