Description

Using LiteLLM, I have access to a variety of models. When I run agent.structured_output, some models like gemini-2.5-flash, gpt-4o return a perfectly formatted output that satisfies output_model but with a finish_reason different from tool_calls.

In my opinion, checking the finish_reason isn’t useful when we're only interested in the content itself.

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

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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