Overview

The Agent node in Dify Chatflow/Workflow lets LLMs autonomously use tools. This plugin features two official Dify Agent reasoning strategies, enabling LLMs to dynamically select and run tools during runtime for multi-step problem-solving.

The Agent node also accepts an optional Allowed tools list (). If the list has names, only those tools from the node’s tool list are sent to the model and allowed to run. Leave it unset or empty to keep the full tool list.

Strategies

1. Function Calling

Function Calling maps user commands to specific functions or tools. The LLM identifies the user's intent, decides which function to call, and extracts the required parameters. It is a straightforward mechanism for invoking external capabilities.

Pros:

• Precise: Directly calls the right tool for defined tasks, avoiding complex reasoning.
• Easy External Integration: Integrates external APIs and tools as callable functions.
• Structured Output: Provides structured function call information for easy processing.

2. ReAct (Reason + Act)

ReAct alternates between the LLM reasoning about the situation and taking actions. The LLM analyzes the current state and goal, selects and uses a tool, and then uses the tool's output for the next thought and action. This cycle repeats until the problem is resolved.

Pros:

• Leverages External Information: Effectively uses external tools to gather information for tasks the model cannot handle alone.
• Explainable Reasoning: Interwoven reasoning and action steps allow some tracking of the Agent's process.
• Wide Applicability: Suitable for tasks requiring external knowledge or specific actions, such as Q&A, information retrieval, and task execution.