"But the true secret of being a hero lies in knowing the order of things. The swineherd cannot already be wed to the princess when he embarks on his adventures, nor can the boy knock at the witch's door when she is away on vacation. The wicked uncle cannot be found out and foiled before he does something wicked. Things must happen when it is time for them to happen. Quests may not simply be abandoned; prophecies may not be left to rot like unpicked fruit; unicorns may go unrescued for a long time, but not forever. The happy ending cannot come in the middle of the story."

Peter S. Beagle in The Last Unicorn

There is no generic drop policy that all T's adhere to and no way the T can know anything about you by your saying, "I may be borderline" when they haven't met you. What you take that to mean and what it means to the T cannot be known until you do something borderlineish that the T identifies as such and until the T decides your individual borderlineish behavior is such that they do not want to work with you, the individual. None of that can be known in advance, especially if you have never been diagnosed by any mental health professional as borderlineish. One T's borderline behavior might be another T's anxious behavior (that is exactly what happened in my case).