Ag2 Add Custom Tool

from autogen.beta import Agent, tool
from autogen.beta.config import OpenAIConfig

@tool
def calculate_shipping_cost(destination: str, weight_kg: float) -> str:
    """Calculates shipping cost for a package to a destination."""
    return "$15.00"

agent = Agent(
    "shipping",
    prompt="Use tools when helpful.",
    config=OpenAIConfig(model="gpt-4o-mini"),
    tools=[calculate_shipping_cost],
)

def get_weather(location: str) -> str:
    """Returns the current weather for a given location."""
    return "Sunny, 22°C"

agent = Agent("weather", tools=[get_weather])

agent = Agent("calc")

@agent.tool
def multiply(a: int, b: int) -> int:
    """Multiplies two integers and returns the result."""
    return a * b

@tool(sync_to_thread=False)
def format_name(first: str, last: str) -> str:
    """Formats a full name."""
    return f"{last.upper()}, {first.capitalize()}"

import aiohttp

@tool
async def fetch(url: str) -> str:
    """Fetches a URL with aiohttp."""
    async with aiohttp.ClientSession() as session:
        async with session.get(url) as r:
            return await r.text()

from typing import Annotated
from pydantic import Field
from autogen.beta import tool

@tool
def set_temperature(
    temp: Annotated[int, Field(description="Target temperature.", ge=10, le=30)],
    mode: Annotated[str, Field(description="Mode.", pattern="^(heat|cool|auto)$")],
) -> str:
    """Sets the thermostat."""
    return f"Set to {temp}°C in {mode} mode."

@tool(name="custom_math_tool", description="Performs advanced math.")
def math_op(a: int, b: int) -> int:
    return a + b

from autogen.beta import DataInput, ImageInput, TextInput, ToolResult, tool

@tool
def get_status(task_id: str) -> TextInput:
    return TextInput(f"Task {task_id} is in progress.")

@tool
def get_user_profile(user_id: str) -> DataInput:
    return DataInput({"id": user_id, "name": "Alice", "role": "admin"})

@tool
def fetch_chart(chart_id: str) -> ImageInput:
    return ImageInput(f"https://charts.example.com/{chart_id}.png")

@tool
def analyze_product(product_id: str) -> ToolResult:
    """Returns image + structured metadata in one tool call."""
    return ToolResult(
        ImageInput(f"https://cdn.example.com/products/{product_id}.jpg"),
        {"id": product_id, "name": "Widget Pro", "stock": 42},
    )

from autogen.beta import ToolResult, tool

@tool
def handoff_to_human(ticket_id: str) -> ToolResult:
    """Escalates and returns the final user-facing message verbatim."""
    return ToolResult(f"Ticket {ticket_id} was escalated.", final=True)

from typing import Annotated
from autogen.beta import Context, Inject, Variable, tool

@tool
def query_db(query: str, ctx: Context) -> str:
    """Runs a SQL query."""
    db = ctx.dependencies["db"]
    return db.execute(query)

@tool
def fetch(url: str, http: Annotated[object, Inject("http_session")]) -> str:
    """Fetches with a shared HTTP session."""
    return http.get(url).text

@tool
def send(text: str, api_key: Annotated[str, Variable()]) -> str:
    """Sends a message via the configured channel."""
    ...