What do you say? if they've specifically asked for your writing credits or experience, and this is a debut novel?
Is there some diplomatic, 'doesn't make me sound desperate' way of phrasing the fact that you're unpublished to date?
Unique insight? I think that may be overstating. You wrote the character so of course you have unique insight, not because of your degree. If you said Like me, Emily has a Msters in Museum Studies, and I use some of my practical experience in the XYZ portion of my manuscript--that sounds a lot better because you've been specific and you haven't overpromised.I have a Masters in Museum Studies which has given me unique insight into Emily's (character's) position within the cultural sector.
Good luck with yours, it must be a fascinating job, so you see you've caught my interest!
Saying what you do for a living if you can compare it to your writing won't hurt but it honestly won't help either. You want to make the letter as short as possible so there is no need to add in things that don't matter the agent.
Trom, that's kind of exactly what I thought too, but if they've asked for something specifically, isn't your (and by your I mean, mine) lack of response meaning that you are failing to address the submission criteria?
I guess that's what I'm worried about. Frankly, I'm hoping my story is strong enough to stand pretty much on it's own, without me rambling about my 'fascinating' job or experience or what have you, since i kind of see them as irrelevant too. Who cares what I do? What matters is whether I wrote a good story, ya know?