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web_search_preview never triggers agents.lifecycle.AgentHooks.on_tool_start #778

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jihun-im-open opened this issue May 28, 2025 · 1 comment
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web_search_preview never triggers agents.lifecycle.AgentHooks.on_tool_start #778

jihun-im-open opened this issue May 28, 2025 · 1 comment
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@jihun-im-open
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jihun-im-open commented May 28, 2025 •
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Please read this first

Yes

Describe the bug

These functions are not called when the tool is web_search_preview

  • agents.lifecycle.AgentHooks.on_tool_start
  • agents.lifecycle.AgentHooks.on_tool_end
  • agents.agent.Agent.tool_use_behavior (A function)

Debug information

  • Agents SDK version: v0.0.15
  • Python version: Python 3.11

Repro steps

Ideally provide a minimal python script that can be run to reproduce the bug.
https://gist.github.com/jihun-im-open/a3892127a0e406500df7e05ff708f090

Expected behavior

The hooks should be triggered for web_search_preview.
As it's tool input is a union of all tools

openai-agents-python/src/agents/tool.py

Line 234 in 6e078bf

Tool = Union[

@jihun-im-open jihun-im-open added the bug Something isn't working label May 28, 2025
@rm-openai
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I should document this better (and we should have named it better), but the on_tool_start is for local tools

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@jihun-im-open @rm-openai