message_history_in_tool_hooks.py
"""
Message History In Tool Hooks
=============================
Access the current run's message history inside tool hooks in a team
via run_context.messages.
"""
from typing import Any, Callable, Dict
from agno.agent import Agent
from agno.models.openai import OpenAIChat
from agno.run.base import RunContext
from agno.team import Team
from agno.tools import FunctionCall, tool
# ---------------------------------------------------------------------------
# Create Members
# ---------------------------------------------------------------------------
def context_aware_hook(
run_context: RunContext,
function_name: str,
function_call: Callable,
arguments: Dict[str, Any],
):
"""Log conversation context before executing a member's tool."""
msgs = run_context.messages
count = len(msgs) if msgs else 0
print(f"[hook] {function_name} - {count} messages in run")
return function_call(**arguments)
def pre_hook(run_context: RunContext, fc: FunctionCall):
msgs = run_context.messages
count = len(msgs) if msgs else 0
print(f"[pre-hook] {fc.function.name} - {count} messages in run")
@tool(pre_hook=pre_hook)
def get_weather(city: str) -> str:
"""Get the current weather for a city."""
return f"Sunny, 72F in {city}"
weather_agent = Agent(
name="Weather Agent",
role="Get weather information for cities",
model=OpenAIChat(id="gpt-4o-mini"),
tools=[get_weather],
tool_hooks=[context_aware_hook],
instructions=["Use the tools to help the user."],
)
# ---------------------------------------------------------------------------
# Create Team
# ---------------------------------------------------------------------------
team = Team(
name="Travel Team",
model=OpenAIChat(id="gpt-4o-mini"),
members=[weather_agent],
mode="coordinate",
)
# ---------------------------------------------------------------------------
# Run Team
# ---------------------------------------------------------------------------
if __name__ == "__main__":
team.print_response("What is the weather in Tokyo?")
Run the Example
1
Set up your virtual environment
uv venv --python 3.12
source .venv/bin/activate
uv venv --python 3.12
.venv\Scripts\activate
2
Install dependencies
uv pip install -U agno openai
3
Export your OpenAI API key
export OPENAI_API_KEY="your_openai_api_key_here"
$Env:OPENAI_API_KEY="your_openai_api_key_here"
4
Run the example
Save the code above as
message_history_in_tool_hooks.py, then run:python message_history_in_tool_hooks.py