[BUG] Agent/model does not pass use_aws `parameters`; make it optional

[brsolomon-deloitte]

Checks

• I have updated to the lastest minor and patch version of Strands
• I have checked the documentation and this is not expected behavior
• I have searched ./issues and there are no duplicates of my issue

Strands Version

1.19.0

Tools Package Version

0.2.17

Tools used

1. use_aws

Python Version

3.11.4

Operating System

macOS 26.1

Installation Method

pip

Steps to Reproduce

import os
from strands import Agent
from strands_tools import use_aws
from strands.models.openai import OpenAIModel

model = OpenAIModel(
    client_args={
        "api_key": os.environ["OPENAI_API_KEY"],
    },
    model_id="gpt-4o",
)


agent("How many s3 buckets are present in my AWS environment in the us-east-1 region?")

python3 use_aws.py

Expected Behavior

agent answers without error

Actual Behavior

agent (regardless of model chosen) almost always fails to pass parameters to use_aws, resulting in the following KeyError:

tool_name=<use_aws> | failed to process tool
Traceback (most recent call last):
  File "REDACTEDpython3.11/site-packages/strands/tools/executors/_executor.py", line 204, in _stream
    async for event in selected_tool.stream(tool_use, invocation_state, **kwargs):
  File "REDACTEDpython3.11/site-packages/strands/tools/tools.py", line 226, in stream
    result = await asyncio.to_thread(self._tool_func, tool_use, **invocation_state)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/asyncio/threads.py", line 25, in to_thread
    return await loop.run_in_executor(None, func_call)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/concurrent/futures/thread.py", line 58, in run
    result = self.fn(*self.args, **self.kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "REDACTEDpython3.11/site-packages/opentelemetry/instrumentation/threading/__init__.py", line 171, in wrapped_func
    return original_func(*func_args, **func_kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "REDACTEDpython3.11/site-packages/strands_tools/use_aws.py", line 283, in use_aws
    parameters = tool_input["parameters"]

Additional Context

No response

Possible Solution

Make parameters optional.

tools/src/strands_tools/use_aws.py

Line 283 in ac6d590

parameters = tool_input["parameters"]

Use parameters = tool_input.get("parameters", {}).

These seems to make sense since the tool checks for "truthiness" of parameters later on anyway:

tools/src/strands_tools/use_aws.py

Line 298 in ac6d590

if parameters:

Related Issues

No response

My hurried solution

Added specific instructions on tool use in system_prompt to correct this error.

[koushal2018]

+1