You can, and for general writing advice it is fine. The difference is what it is measuring against. A general chatbot has no idea what an ISMG is for your task, so it tells you what good writing looks like in the abstract. Your teacher marks it against a specific set of criteria and descriptors on a specific sheet.
That gap is where marks go missing. A response can be well written and still sit mid-band because it names techniques instead of analysing their effect, or because it evaluates two sources when the descriptor asks for three. Generic advice will not catch either, because generic advice is not reading the marking guide your work is graded against.
The other difference is what happens to the work. This tool reads what you wrote. That distinction is also what keeps it on the right side of your school’s academic integrity policy.