Class DynamicStructuredTool<T>

A tool that can be created dynamically from a function, name, and description, designed to work with structured data. It extends the StructuredTool class and overrides the _call method to execute the provided function when the tool is called.

Type Parameters

  • T extends z.ZodObject<any, any, any, any> = z.ZodObject<any, any, any, any>

Hierarchy

Constructors

Properties

description: string
func: ((input, runManager?) => Promise<string>)

Type declaration

    • (input, runManager?): Promise<string>
    • Parameters

      Returns Promise<string>

name: string
returnDirect: boolean = false
schema: T
verbose: boolean

Whether to print out response text.

callbacks?: Callbacks
metadata?: Record<string, unknown>
tags?: string[]
lc_runnable: boolean = true

Methods

  • Calls the tool with the provided argument, configuration, and tags. It parses the input according to the schema, handles any errors, and manages callbacks.

    Parameters

    • arg: string | {}

      The input argument for the tool.

    • Optional configArg: Callbacks | BaseCallbackConfig

      Optional configuration or callbacks for the tool.

    • Optional tags: string[]

      Optional tags for the tool.

    Returns Promise<string>

    A Promise that resolves with a string.

  • Invokes the tool with the provided input and configuration.

    Parameters

    • input: string | {}

      The input for the tool.

    • Optional config: BaseCallbackConfig

      Optional configuration for the tool.

    Returns Promise<string>

    A Promise that resolves with a string.

  • Create a new runnable sequence that runs each individual runnable in series, piping the output of one runnable into another runnable or runnable-like.

    Type Parameters

    • NewRunOutput

    Parameters

    • coerceable: RunnableLike<string, NewRunOutput>

      A runnable, function, or object whose values are functions or runnables.

    Returns RunnableSequence<string | {}, Exclude<NewRunOutput, Error>>

    A new runnable sequence.

  • Stream all output from a runnable, as reported to the callback system. This includes all inner runs of LLMs, Retrievers, Tools, etc. Output is streamed as Log objects, which include a list of jsonpatch ops that describe how the state of the run has changed in each step, and the final state of the run. The jsonpatch ops can be applied in order to construct state.

    Parameters

    • input: string | {}
    • Optional options: Partial<BaseCallbackConfig>
    • Optional streamOptions: Omit<LogStreamCallbackHandlerInput, "autoClose">

    Returns AsyncGenerator<RunLogPatch, any, unknown>

  • Default implementation of transform, which buffers input and then calls stream. Subclasses should override this method if they can start producing output while input is still being generated.

    Parameters

    • generator: AsyncGenerator<string | {}, any, unknown>
    • options: Partial<BaseCallbackConfig>

    Returns AsyncGenerator<string, any, unknown>

  • Helper method to transform an Iterator of Input values into an Iterator of Output values, with callbacks. Use this to implement stream() or transform() in Runnable subclasses.

    Type Parameters

    • I extends string | {}

    • O extends string

    Parameters

    • inputGenerator: AsyncGenerator<I, any, unknown>
    • transformer: ((generator, runManager?, options?) => AsyncGenerator<O, any, unknown>)
        • (generator, runManager?, options?): AsyncGenerator<O, any, unknown>
        • Parameters

          Returns AsyncGenerator<O, any, unknown>

    • Optional options: BaseCallbackConfig & {
          runType?: string;
      }

    Returns AsyncGenerator<O, any, unknown>

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