APIActive

VS Code Language Model Tool API

API for VS Code extensions to contribute domain-specific tools that LLM agents can invoke during chat conversations.

Field note

What it does

Enables VS Code extensions to register language model tools with static package.json configuration and TypeScript implementation. Supports tool-calling flow where LLM generates parameters and the extension executes the tool function.

Capabilities

Available capabilities

Visual Studio Marketplace distribution Static tool registration in package.json TypeScript tool implementation Agent mode tool invocation

Authorization

VS Code Language Model Tool API

What it does

Available capabilities

Tags

Ways to use it

Product features

Authorization

Dynamic tool discovery

Extension API

MCP developer guide

MCP features supported by VS Code

Prompts

Resource templates

Resources

Tool annotations

Tool definition

Tools

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