Even if you try to get them to not, they will still overcomment the code. Or at least overcomment it from the perspective of a human. From the perspective of the LLM, I suspect the comments are necessary for it to be able to get the code output correct.
It's also a discoverability tool. If the code has good docstrings and decent naming for functions/variables it's a lot easier for the LLM to find the correct places to edit.
Even if you try to get them to not, they will still overcomment the code. Or at least overcomment it from the perspective of a human. From the perspective of the LLM, I suspect the comments are necessary for it to be able to get the code output correct.
It's also a discoverability tool. If the code has good docstrings and decent naming for functions/variables it's a lot easier for the LLM to find the correct places to edit.