Hi Penelope,
I would start out with a general question on how s/he approached medical care. (I ask this because I want to know how holistic they are, if the patient is like a car to be fixed with the latest drug/tool, or a whole person to be figured out, or what.) Then ask what the reaction would be to a patient doing her own research, has that ever happened, what does s/he think about this. You need to know how secure and inclusive s/he is in your treatment. Some doctors seem to think that when they treat you, it is none of your business how/what/why they do.
Then go on to ask what her philosophy is about sharing information with the patient. Because your main concern is this (if not, tailor to your main concern).
Then be upfront about what you are looking for, without criticising your current physician. S/he can be different with different patients, depending on what they need/want. It does not have to be a one size fits all (although it might be).
This is just what I would do. Hope it is helpful.
Good luck.
Plucky