I think that its fine for a T to say that they have been in therapy, but I don't know if they should tell your their dx or what meds they are on. Someone being in therapy seems pretty general to me, and I don't mind knowing that, but knowing more specific things could feel burdensome. It sounds like he might have a tendency to be a little too open. But I think it just comes down to what feels right to you.

I started figuring out somethings about my T's mental health a while back because of the way that she was relating to me in session. We had a talk about it, and she has stopped, and I'm glad of that. And it hasn't been a problem that I leaned a bit about her, but I wouldn't want it to continue. So it might work if the the T is able to maintain strict boundaries about not informing you about himself further, but if you have hesitation about it, I think you should see someone else. I've found with T's you just have to go with your gut. Telling yourself that they have experience with all of the same issues that you have just isn't enough, you just have to have a feeling about the person.