It's never going to not be a negotiation. All you're doing is limiting your options by arguing from personality typology. What you should be doing is asking behavioral questions and digging in on the responses you get. You'll get better information about what a candidate will do and how they reason through interpersonal problems than asking them questions like "which would you prefer on your time off -- going to a party with a lot of people, or spending time inside reading a book?" Questions like that which appear on many personality inventories are so abstract as to be almost meaningless.

Also you need to understand that if you start personality testing people you will never get any truthful information from your candidates. They do this kind of testing for many retail sales roles and every sales associate you'll ever meet knows exactly how to answer every question to maximize extraversion and minimize undesirable traits. It quickly stops being a test of whether you have what it takes, unless your intent is to test whether people are deeply aware of how fake personality testing is and exactly how to game the system to get past it.