I'm not sure I understand this. Do you mean that the therapist should disclose their own "attachment style" to their patient? That doesn't sound like something I would want to know about my T, and it couldn't possibly help my therapy. Or that the T should score the test for the patient? Of course it is always interesting to discuss differences between how others perceive us and how we perceive ourselves, but I'm not sure I'd do that based on a test. (Though since it is a test that doesn't apply to me, I know I'm biased against it.)