Combine built-in tools and function calling

Gemini allows the combination of built-in tools, such as google_search, and function calling (also known as custom tools) in a single interaction by preserving and exposing the context history of tool calls. Built-in and custom tool combinations allow for complex, agentic workflows where, for example, the model can ground itself in real-time web data before calling your specific business logic.

Here's an example that enables built-in and custom tool combinations with google_search and a custom function getWeather:

# This will only work for SDK newer than 2.0.0
from google import genai

client = genai.Client()

getWeather = {
    "type": "function",
    "name": "getWeather",
    "description": "Gets the weather for a requested city.",
    "parameters": {
        "type": "object",
        "properties": {
            "city": {
                "type": "string",
                "description": "The city and state, e.g. Utqiaġvik, Alaska",
            },
        },
        "required"