There are questions there - the magic is not his own? How then is it transferred to him? Does it have something to do with the snake coiled there behind his collar even now? In what way does this 'overseer' manage that? What is he meant to have done? What obligation is so serious that he might be sent elsewhere (this being a rather broad application of the term indeed) for somehow failing to meet it? -, but there is more pressing business at hand.

Namely, justifying what seems very much like an oversight when it's phrased like he has said it.

"Misters Stark and Fitz have, I gather, certain obligations of their own in the places they left behind. I have no such thing, and so Thedas itself has historically been a far more appealing mystery to me than what I am or how I came to be here."