Fix: workflow tool - Created task agent with 0 tools

[vria]

Description

In my workflow there is a task without any tools. Currently there is no way to create such task.

parent_agent = Agent(
    name="Parent agent",
    system_prompt="...",
    tools=[workflow, file_read, file_write],
)

result = parent_agent.tool.workflow(
    action="create",
    workflow_id="...",
    agent=parent_agent,
    tasks=[
        {
            "task_id": "task_without_tools",
            "description": "...",
            "system_prompt": "...",
            "tools": [], # <--- Explicit empty array should mean no tools
            # <--- omit "tools" or setting it to None should inherit tools from parent_agent
        },
    ]
}

In fact there is a trick to create an agent without tools:

"tools": ["non_existent"],

It just causes a warning in the workflow tool but successfully creates an agent without tools.

Related Issues

None

Documentation PR

None

Type of Change

Bug fix
Breaking change for those who explicitly set tools: [] in workflow task and relay on tools inherited from parent_agent.

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

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
• My changes generate no new warnings
• Any dependent changes have been merged and published

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[cagataycali]

thank you for contributing!