from anthropic import Anthropic

tools = [{
    "name": "get_weather",
    "description": "Get weather for a location",
    "input_schema": {
        "type": "object",
        "properties": {
            "location": {"type": "string"}
        },
        "required": ["location"]
    }
}]

response = client.messages.create(
    model="claude-sonnet-4-20250514",
    tools=tools,
    messages=[{"role": "user", "content": "Weather in Tokyo?"}]
)

from langchain_core.tools import tool

@tool
def search(query: str) -> str:
    """Search the web for information."""
    return web_search(query)

# Good: verb_noun, clear description
{
    "name": "search_products",
    "description": """Search product database.
    USE WHEN: User asks about products.
    DO NOT USE: For order status (use get_order instead)."""
}

# Bad: vague
{"name": "helper", "description": "Helps with stuff"}