Alex Merced • 4/13/2025

A Journey from AI to LLMs and MCP - 9 - Tools in MCP — Giving LLMs the Power to Act

This technical article details the 'Tools' component of the Model Context Protocol (MCP). It explains how tools are executable functions that allow Large Language Models (LLMs) to perform actions like running shell commands, calling REST APIs, or posting GitHub issues. The post covers tool discovery, invocation, model-controlled use with user oversight, common design patterns, and security practices, enabling agentic behavior for LLMs.

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#api #llm #mcp