Function●Since v1.0

llmToolSelectorMiddleware

llmToolSelectorMiddleware(
  options: __type
): AgentMiddleware<undefined, ZodObject<__type, "strip", ZodTypeAny, __type, __type>,

View source on GitHub

Parameters

Name	Type	Description
`options`*	`__type`

Middleware for selecting tools using an LLM-based strategy.

When an agent has many tools available, this middleware filters them down to only the most relevant ones for the user's query. This reduces token usage and helps the main model focus on the right tools.

import { llmToolSelectorMiddleware } from "langchain/agents/middleware";

const middleware = llmToolSelectorMiddleware({ maxTools: 3 });

const agent = createAgent({
  model: "openai:gpt-4o",
  tools: [tool1, tool2, tool3, tool4, tool5],
  middleware: [middleware],
});

const middleware = llmToolSelectorMiddleware({
  model: "openai:gpt-4o-mini",
  maxTools: 2
});

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llmToolSelectorMiddleware

Parameters

Example 1

Example 2

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llmToolSelectorMiddleware

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Parameters

Example 1

Example 2