I’d prefer a simple request, such as “Please advise the nature of the writing that you would expect of me.” Or even simpler if possible. When in doubt, go straight to the point.

But I think there are better ways to express this thought in this context. How about “What information are you looking for?” or “Please specify the information you would like to see.”

As for closing, it never hurts to say something like “Thank you for your time and attention.”

I was wondering what kind of writing you are expecting.

Using “are you” implies a question. “You are” is a statement.

You would not use the past tense (were) because that implies that the recipient of your response no longer has any expectations.

neither of your choices were correct