This is external tools that you are allowing the model to have access to. There is a suite of internal tools that the model has access to regardless.
The external python tool is there so it can provide the user with python code that they can see.
You can read a bit more about the distinction between the internal and external tool capabilities here: https://community.openai.com/t/fun-with-gpt-5-code-interpret...
"I should explain that both the “python” and “python_user_visible” tools execute Python code and are stateful. The “python” tool is for internal calculations and won’t show outputs to the user, while “python_user_visible” is meant for code that users can see, like file generation and plots."
But really the most important thing, is that we as end-users cannot with any certainty know if the model used python, or didn't. That's what the alignment faking article describes.