Only the first part's text is returned from last_event.content.parts, causing loss of multi-part responses #606
Description
File: agent_tool.py
Description:
The code returns only the text of the first part in last_event.content.parts:
tool_result = last_event.content.parts[0].text
This implementation causes issues when the response contains multiple parts, as only the first part's text is returned and any additional parts are ignored. As a result, important information in subsequent parts is lost, leading to incomplete or incorrect tool outputs.
Expected behavior:
All parts' texts should be concatenated (e.g., joined with \n) and returned as a single string, so that multi-part responses are handled correctly.
Suggested fix:
Replace the above line with:
tool_result = "\n".join(
[p.text for p in last_event.content.parts if getattr(p, "text", None)]
)
This will ensure that all available text parts are included in the tool result.