I would also suggest that you ask the admissions consultants you interview for some high-level feedback about your profile in relation to the schools on your target list and whether he or she feels that your expectations realistic. You want to be on the same wavelength with your consultant regarding school selection to avoid surprises later in the process. You don't need to decide on the final list of schools on an introductory call, but you do want to ensure agreement on whether the consultant feels that the schools you plan to apply to are a good fit with your profile.
Because you are considering working with an admissions consultant you might be interested in a blog post I wrote on that topic entitled: "Should I hire an MBA admissions consultant or not?"
Here is the link:
https://mbaprepschool.com/qa-should-i-hire-an-mba-admissions-consultant-or-not/