QueryEngine Tool

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Node Details

  • Name: queryEngineToolLlamaIndex
  • Type: QueryEngineTool
  • Version: 2.0
  • Category: Tools

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Input Parameters

  1. Base QueryEngine
    • Label: Base QueryEngine
    • Name: baseQueryEngine
    • Type: BaseQueryEngine
    • Description: The underlying query engine that this tool will use for processing queries.
  2. Tool Name
    • Label: Tool Name
    • Name: toolName
    • Type: string
    • Description: A unique identifier for the tool. Must be in lowercase with underscores (e.g., “my_tool”).
  3. Tool Description
    • Label: Tool Description
    • Name: toolDesc
    • Type: string
    • Description: A brief description of what the tool does or its purpose.

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Output

The node initializes and returns a QueryEngineTool instance, which can be used in other parts of your application or workflow.

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Usage

This node is typically used in scenarios where you need to:
  1. Integrate a query engine into a larger AI system.
  2. Create a tool that can be used by language models to access and query specific information.
  3. Build a modular system where different query engines can be swapped or combined.

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Implementation Details

  • The node uses the QueryEngineTool class from the LlamaIndex library.
  • It takes the base query engine, tool name, and description as inputs.
  • The init method creates and returns a new QueryEngineTool instance with the provided parameters.

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Base Classes

  • QueryEngineTool
  • Tool_LlamaIndex
This node serves as a bridge between raw query engines and higher-level AI applications, allowing for more flexible and powerful information retrieval systems.