conversation manager - summarization - noop tool

[pgrayy]

Description

Bedrock model requests will fail if messages contain any tool use or tool result blocks and no toolConfig is provided. To demonstrate, you can run the following script:

from strands import Agent

agent = Agent(
    messages=[
        {
            "role": "user",
            "content": [
                {
                    "text": "What is the current time in New York."
                },
            ],
        },
        {
            "role": "assistant",
            "content": [
                {
                    "toolUse": {
                        "input": {
                            "city": "New York",
                        },
                        "name": "current_time",
                        "toolUseId": "t1",
                    },
                },
            ],
        },
        {
            "role": "user",
            "content": [
                {
                    "toolResult": {
                        "content": [
                            {
                                "text": "12:31",
                            },
                        ],
                        "status": "success",
                        "toolUseId": "t1",
                    },
                },
            ],
        },
    ],
)
agent("Please summarize this conversation.")

This will result in the following error:

botocore.errorfactory.ValidationException: An error occurred (ValidationException) when calling the ConverseStream operation: The toolConfig field must be defined when using toolUse and toolResult content blocks.

This is problematic for our summarization manager when configured with a bedrock agent that uses no tools. To fix, I am adding a noop tool to the agent tool registry when no tools are configured.

Related Issues

#998

Documentation PR

N/A

Type of Change

Bug fix

Testing

How have you tested the change? Verify that the changes do not break functionality or introduce warnings in consuming repositories: agents-docs, agents-tools, agents-cli

• I ran hatch run prepare: Wrote new unit tests
• hatch test tests_integ/test_summarizing_conversation_manager_integration.py: Wrote new integ tests.

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

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