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.