Google ADK

pip install "agentguard-oss[adk]"

guarded_tool registers a function with the Guard and returns an ADK FunctionTool. ADK builds the declaration from the function's signature and docstring, which the guarded wrapper preserves.

from google.adk.agents import Agent

from agentguard import Guard
from agentguard.adapters.adk import guarded_tool

guard = Guard("policy.yaml", audit="agentguard.jsonl")


def lookup_order(order_id: str) -> dict:
    """Look up an order by ID."""
    ...


agent = Agent(
    name="support",
    model="gemini-2.5-flash",  # or a Gemma model served for ADK
    instruction="Help customers with their orders.",
    tools=[guarded_tool(guard, lookup_order, capability="crm.read")],
)

crm.read is a custom capability; declare it in the policy.

Options

Argument	Default	Meaning
capability	required	The tool's capability
name	function name	Tool name
return_denials	True	Return denials as {"error": ..., "reasons": [...]}, ADK's usual error shape
**options		Passed to guard.tool

Already decorated with @guard.tool? Use from_guarded(guarded_function).