Model Context Protocol (MCP)

MCP vs Function Calling

Function Calling and MCP are different concepts. Function Calling helps an AI model decide what action to perform. MCP provides a standard way to communicate with external systems.

🟡 Intermediate 8–10 min

This lesson stays conceptual and uses simple diagrams only.

Interactive Examples

Pick a request. Function Calling happens at the model step: the model chooses an action, then the host maps that action to the right MCP path.

Connected Result

Function Calling chooses

Host maps to MCP

Comparison Table

Function Calling	MCP
Decides an action	Provides a communication standard
Used by the model	Used by the AI application
Focuses on actions	Focuses on external connections
Can be used without MCP	Can be used without Function Calling

💡 Key Takeaways

Function Calling helps the model choose the action.

The host can map that action to the right MCP client.

MCP carries the request to the MCP server and external system.

🧪 Try This 3 ideas

Select different user requests.

Watch where Function Calling ends and MCP begins.

Observe what changes and what stays the same.

🧠🔌

Function Calling helps the AI model decide what to do. MCP provides a standard way to communicate with external domains and systems. They solve different problems and can work together.

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