How to create a toolkit with the list of structured tools?

[machulav]

Hi everyone,

I've created a list of tools by directly implementing the StructuredTool. And now I want to create a toolkit using these tools. However, I realized that I could not add the structured tools to the toolkit because the toolkit expects the tools of type Tool, not the StructuredTool:

export abstract class Toolkit {
  abstract tools: Tool[];
}

I also tried looking for examples of where the structured tools are used in the toolkit but didn't find any.

Can anyone suggest how to do this and if it's even possible?

[dosubot[bot]]

🤖

Hi @machulav,

I'm Dosu, a bot here to help you with your questions and issues while we wait for a human maintainer. Don't worry, I'm here to guide you through this process. 😊

Based on the information you've provided, it seems like you're trying to add StructuredTool objects to a Toolkit. The Tool class in langchainjs is a subclass of StructuredTool, which means that StructuredTool objects can be used wherever Tool objects are expected, due to the principle of polymorphism. Therefore, you should be able to add StructuredTool objects to a Toolkit in the same way you would add Tool objects.

However, without the implementation of the Toolkit class, it's hard to provide a specific code example. If the Toolkit class has a method for adding Tool objects, you can use that same method to add StructuredTool objects. If it doesn't, you'll need to modify the Toolkit class to support adding Tool objects, and those changes will also allow you to add StructuredTool objects.

I also found a similar issue in the langchainjs repository: Is it possible to use StructuredTool with any Agent? . The suggested solution is that there is an open PR for adding an agent that can support StructuredTool which should be merged soon. The PR number is #1103. This might be relevant to your situation.

To give you a bit more context, the Tool and StructuredTool classes in the langchainjs codebase are both base classes for creating tools, but they differ in the type of input they accept. The StructuredTool class is a base class for tools that accept input of any shape defined by a Zod schema, while the Tool class is a base class for tools that accept input as a string.

I hope this helps! If you could provide the implementation of the Toolkit class, I could give a more specific answer.

Sources

• Is it possible to use StructuredTool with any Agent?
• langchain-core/src/tools.ts

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