MCP tools: external APIs directly in model context

The Model Context Protocol (MCP) standardizes how models access tools.

Why this matters

• unified tool interface
• less glue code
• better reusability

Typical flow

1. Register a tool
2. Define the input schema
3. Let the model call the tool when needed
4. Feed the result back into the final response

This enables seamless integration of external data sources into model context.