FlowScout: From Execution Feedback to Reliable Tool-Using Agent Workflows

2026-08-10

AI Summary

This work addresses the limitations of existing agent workflows, which predominantly rely on abstract structures from large language models and lack genuine tool integration, resulting in poor usability and stability. To overcome this, we propose FlowScout, a novel framework that explicitly models real-world tool invocations as nodes in a directed graph. FlowScout integrates tool coordination skeleton mining with a Monte Carlo Tree Search mechanism guided by execution feedback to automatically optimize workflow topology. Experimental results across four task domains demonstrate that FlowScout significantly outperforms baseline methods—including PM4Py, ReAct, and AFlow—with at least a 92.69% improvement in tool invocation accuracy, a minimum 17.66% gain in execution quality, and enhanced runtime stability.

Abstract

Agentic workflows have become an important abstraction for building reliable LLM-based automation systems by organizing large language models (LLMs), tools, and control logic into explicit execution structures. However, constructing high-quality agentic workflows remains largely manual and requires substantial domain expertise. Recent studies have explored automatic agentic workflow generation from historical task-solving records, but they mainly produce LLM-centric workflows, where real tool executions are abstracted and simulated by LLM nodes, limiting the usability and stability of generated workflows. To address these limitations, we propose FlowScout, an execution-guided framework for generating tool-integrated agentic workflows from historical task-solving records. Specifically, FlowScout represents an agentic workflow as a directed graph composed of LLM nodes, tool-calling nodes, and dependency edges. It first mines a common tool coordination skeleton from historical records to construct an initial workflow, and then refines the workflow topology through Monte Carlo tree search guided by execution feedback. We evaluate FlowScout on four representative task domains and compare it with three baselines, i.e., PM4Py, ReAct and AFlow. Experimental results show that agentic workflows generated by FlowScout improve tool invocation correctness by at least 92.69% and execution quality by at least 17.66% over the baselines, while achieving lower performance variation across repeated runs.

Problem

• agentic workflows
• tool integration
• workflow generation
• execution feedback
• LLM-based automation

Innovation

• tool-integrated agentic workflows
• execution feedback
• Monte Carlo tree search
• workflow generation
• LLM-based automation