One of the things that just makes me snarl when reading query letters is "your job as an agent" followed by anything. Even if it's complimentary.
It grates on my next to last nerve.
The query letter isn't about my job as an agent; not how hard it is (it isn't), how important it is (I'm not curing cancer here), or what a divine responsibility it is (the only divinity in this office comes in a box). I'm not making those up either--I've seen all of them.
A query letter is about YOU. Tell me about your project. And you, if you must. We can save extolling my fabulosity until I've done something hard, important or divine: like sell your book.