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feat: add interactive wait tool for human-in-the-loop tasks #109

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feat: add interactive wait tool for human-in-the-loop tasks #109

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005c537
feat: add interactive wait tool for human-in-the-loop tasks
chenning9821 Feb 14, 2026
36689b4
fix: address code review feedback (security sanitization + logic bug)
chenning9821 Feb 14, 2026
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25 changes: 22 additions & 3 deletions agent.py
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Original file line number Diff line number Diff line change
Expand Up @@ -58,7 +58,18 @@
def multiply_numbers(x: float, y: float) -> dict:
"""Multiplies two numbers."""
return {"result": x * y}

def wait_for_user_input(prompt_text: str) -> dict:
"""Pauses the agent and waits for the user to press Enter in the terminal."""

safe_prompt = "".join(ch for ch in prompt_text if ch.isprintable())

print(f"\n" + "="*40)
print(f"🛑 AGENT REQUEST: {safe_prompt}")
print(f"="*40 + "\n")

input("Press Enter to continue execution...")

return {"status": "success", "message": "User confirmed action complete."}

class BrowserAgent:
def __init__(
Expand Down Expand Up @@ -96,7 +107,10 @@ def __init__(
# For example:
types.FunctionDeclaration.from_callable(
client=self._client, callable=multiply_numbers
)
),
types.FunctionDeclaration.from_callable(
client=self._client, callable=wait_for_user_input
),
]

self._generate_content_config = GenerateContentConfig(
Expand All @@ -122,6 +136,7 @@ def handle_action(self, action: types.FunctionCall) -> FunctionResponseT:
"""Handles the action and returns the environment state."""
if action.name == "open_web_browser":
return self._browser_computer.open_web_browser()

elif action.name == "click_at":
x = self.denormalize_x(action.args["x"])
y = self.denormalize_y(action.args["y"])
Expand Down Expand Up @@ -193,6 +208,8 @@ def handle_action(self, action: types.FunctionCall) -> FunctionResponseT:
# Handle the custom function declarations here.
elif action.name == multiply_numbers.__name__:
return multiply_numbers(x=action.args["x"], y=action.args["y"])
elif action.name == wait_for_user_input.__name__:
return wait_for_user_input(prompt_text=action.args["prompt_text"])
else:
raise ValueError(f"Unsupported function: {action}")

Expand Down Expand Up @@ -347,8 +364,10 @@ def run_one_iteration(self) -> Literal["COMPLETE", "CONTINUE"]:
)
)
elif isinstance(fc_result, dict):
response_data = fc_result.copy()
response_data.update(extra_fr_fields)
Comment on lines +367 to +368
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@gemini-code-assist gemini-code-assist Bot Feb 14, 2026

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security-medium medium

The response_data dictionary, which correctly incorporates the safety_acknowledgement field, is prepared on these lines but is not actually used in the subsequent FunctionResponse constructor call on line 376. Instead, the original fc_result is passed. This results in the safety_acknowledgement being omitted for custom tools, which can lead to 400 INVALID_ARGUMENT errors from the Gemini API. To complete the fix, line 376 should be updated to use response_data.

function_responses.append(
FunctionResponse(name=function_call.name, response=fc_result)
FunctionResponse(name=function_call.name, response=response_data)
)

self._contents.append(
Expand Down