Function tool

tool<RunInput, RunOutput>(func, fields): _Tool<RunInput, RunOutput>
Creates a new StructuredTool instance with the provided function, name, description, and schema.
Type Parameters
- RunInput extends ZodAny
  The input schema for the tool.
- RunOutput extends string | Record<string, any> = string
Parameters
- func: RunnableFunc<RunInput, RunOutput>
  The function to invoke when the tool is called.
- fields: {
      name: string;
      schema: RunInput;
      description?: string;
  }
  An object containing the following properties:
  - name: string
    The name of the tool.
  - schema: RunInput
    The Zod schema defining the input for the tool.
  - Optional description?: string
    The description of the tool.
Returns _Tool<RunInput, RunOutput>
A new StructuredTool instance.

Function
- Defined in langchain-core/src/tools.ts:445

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