web_search_preview never triggers agents.lifecycle.AgentHooks.on_tool_start

[jihun-im-open]

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[

[rm-openai]

I should document this better (and we should have named it better), but the on_tool_start is for local tools