Microsoft Agent Framework observability

import asyncio
from typing import Annotated

from agent_framework import Agent, tool
from agent_framework.openai import OpenAIChatClient
from lmnr import Laminar, observe

Laminar.initialize()

@tool
def search_flights(
    origin: Annotated[str, "Origin airport code"],
    destination: Annotated[str, "Destination airport code"],
    date: Annotated[str, "Departure date, YYYY-MM-DD"],
) -> str:
    """Search flights between two airports."""
    return f"Options {origin}->{destination} on {date}: DL204 Delta $412, UA880 United $438."

@tool
def search_hotels(
    city: Annotated[str, "City name"],
    check_in: Annotated[str, "Check-in date, YYYY-MM-DD"],
    check_out: Annotated[str, "Check-out date, YYYY-MM-DD"],
) -> str:
    """Search hotels in a city."""
    return f"Hotels in {city}: Kimpton Gray $285/nt, Hyatt Place $199/nt."

client = OpenAIChatClient(model="gpt-5-mini")

flight_agent = Agent(
    client=client,
    name="FlightAgent",
    instructions="You are a flight search specialist. Return one recommended flight.",
    tools=[search_flights],
)

hotel_agent = Agent(
    client=client,
    name="HotelAgent",
    instructions="You are a hotel booking specialist. Return one recommended hotel.",
    tools=[search_hotels],
)

concierge = Agent(
    client=client,
    name="Concierge",
    instructions=(
        "You are a travel concierge. Always call book_flight and book_hotel, "
        "then summarize the trip. Do not ask follow-up questions."
    ),
    tools=[
        flight_agent.as_tool(name="book_flight", description="Find and book a flight."),
        hotel_agent.as_tool(name="book_hotel", description="Find and book a hotel."),
    ],
)

@observe(name="plan-trip")
async def main():
    result = await concierge.run(
        "Plan a trip from JFK to Chicago on 2026-05-12, returning 2026-05-15."
    )
    print(result.text)

if __name__ == "__main__":
    asyncio.run(main())

plan-trip
└── Concierge
    ├── chat gpt-5-mini
    ├── book_flight
    │   └── FlightAgent
    │       ├── chat gpt-5-mini
    │       ├── search_flights
    │       └── chat gpt-5-mini
    ├── book_hotel
    │   └── HotelAgent
    │       ├── chat gpt-5-mini
    │       ├── search_hotels
    │       └── chat gpt-5-mini
    └── chat gpt-5-mini