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fix(agent_tool): handle case when last_content.parts are unavailable #3728

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fix(agent_tool): handle case when last_content.parts are unavailable #3728

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d0f4948
fix(agent_tool): handle case when last_content.parts are unavailable
sumkincpp Nov 26, 2025
87fca92
fix(agent_tool): case when merged_text is empty
sumkincpp Nov 26, 2025
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5 changes: 4 additions & 1 deletion src/google/adk/tools/agent_tool.py
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Original file line number Diff line number Diff line change
Expand Up @@ -186,9 +186,12 @@ async def run_async(
# to avoid "Attempted to exit cancel scope in a different task" errors
await runner.close()

if not last_content:
if not last_content or not last_content.parts:
return ''
merged_text = '\n'.join(p.text for p in last_content.parts if p.text)
# no text present -> no json, return empty string
if not merged_text:
return ''
if isinstance(self.agent, LlmAgent) and self.agent.output_schema:
tool_result = self.agent.output_schema.model_validate_json(
merged_text
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