Function calling in Gemini lets the model call external APIs and tools during a conversation — enabling agentic AI applications.

How It Works

1. Define functions with name, description, and parameters
2. Gemini decides when to call a function based on the conversation
3. Your code executes the function
4. Results are returned to Gemini to form the final answer

Example Functions

• get_weather(location)
• search_database(query)
• send_email(to, subject, body)
• get_stock_price(ticker)

Reference:

Gemini function calling

https://ai.google.dev/gemini-api/docs/function-calling