Model Context Protocol (MCP) Learning Notes

Model Context Protocol (MCP) Learning Notes

Video Reference

• Source: Web Dev Simplified YouTube Video
• Credits: Web Dev Simplified (YouTube channel)

What is MCP?

Model Context Protocol (MCP) is a protocol that defines how a client (such as an LLM) can communicate and use tools and resources defined at the server level. It implements a client-server architecture with the following components:

• Tools
• Resources
• Prompts
• Samplings

Documentation & Resources

• Official documentation: modelcontextprotocol.io/introduction
• Includes starter projects in multiple languages for MCP client and server implementation

Implementation Details

Server Setup

The src/server.ts file contains the code for creating an MCP server and defining tools, resources, and prompts.

Testing the Implementation

1. Build the server:

   npm run server:build
   

2. Add to VS Code using the "Add MCP server" command
3. Access server functionality in the Copilot chat UI
4. Use "#" followed by tool name to access implemented tools

Implemented Features

Resources

• users: Retrieves all users from the JSON file
• user-details: Retrieves user details by ID

Tools

• create-user: Creates a new user with the following parameters:
  • username
  • email
  • address
  • age
  • phone number
• create-random-user: Generates and creates a random user

Prompts

• generate-fake-user: Prompt with fixed fields for generating fake user data

Sampling

• create-random-user: This uses sampling i.e. calling requests on the LLM or clientto generate something.