fix: restore correct context parameter for function tool hooks

- Function tools should use tool_context (ToolContext)
- Computer/shell tools use context_wrapper (RunContextWrapper)
- This maintains consistency with original codebase

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: yanmxa

src/agents/_run_impl.py

@@ -546,9 +546,9 @@ async def run_single_tool(action: ToolRunFunction) -> Any:
                     span_fn.span_data.input = tool_call.arguments
                 try:
                     _, _, result = await asyncio.gather(
-                        hooks.on_tool_start(context_wrapper, agent, action),
+                        hooks.on_tool_start(tool_context, agent, action),
                         (
-                            agent.hooks.on_tool_start(context_wrapper, agent, action)
+                            agent.hooks.on_tool_start(tool_context, agent, action)
                             if agent.hooks
                             else _coro.noop_coroutine()
                         ),