Agent with Tools

Give a Vertex AI Claude agent a web search tool and let Agno run the tool-use loop.

Attach WebSearchTools to a Vertex AI Claude agent to answer questions with current web results.

Code

from agno.agent import Agent
from agno.models.vertexai.claude import Claude
from agno.tools.websearch import WebSearchTools

agent = Agent(
    model=Claude(id="claude-sonnet-4-6"),
    tools=[WebSearchTools()],
    markdown=True,
)
agent.print_response("Whats happening in France?")

Usage

Complete the Vertex project, model enablement, permissions, and CLI prerequisites first. Use a region that serves Sonnet 4.6.

Set up your virtual environment

uv venv --python 3.12
source .venv/bin/activate

Set your environment variables

export CLOUD_ML_REGION="us-east5"
export GOOGLE_CLOUD_PROJECT=xxx

Authenticate your CLI session

gcloud auth application-default login
You don't need to authenticate your CLI every time.

Install dependencies

uv pip install -U 'anthropic[vertex]' ddgs agno

Run Agent

Save the code above as tool_use.py, then run:

python tool_use.py