One option would be to take an initial stab at the documentation yourself - that makes it clear to the submitter where things are unclear, because you made mist

One option would be to take an initial stab at the documentation yourself - that makes it clear to the submitter where things are unclear, because you made mistakes or omitted things, and they can just correct that, which is a lot more feasible to do than figuring out what's important while your head is in the code.