Update docs/tools.md

Co-authored-by: pakrym-oai <[email protected]>

Author: rm-openai

docs/tools.md

@@ -261,7 +261,7 @@ async def main():
 
 ### Customizing tool-agents
 
-The `agent.as_tool` function is a convenience method to make it easy to turn an agent into a tool. It doesn't support all configuration though; for example, you can't set `max_turns`. For advanced use cases, it's very easy to configure it yourself:
+The `agent.as_tool` function is a convenience method to make it easy to turn an agent into a tool. It doesn't support all configuration though; for example, you can't set `max_turns`. For advanced use cases, use `Runner.run` directly in your tool implementation:
 
 ```python
 @function_tool