I have a question about terminology. I received a request for a full along with a detailed synopsis "...and a list of submissions to other agencies or publishers, if any." I wasn't sure if this meant a list of queries sent or just a list of any agencies or publishers who also have the full ms.
It means a list of places that are looking at your manuscript. That's a submission. A query is only a query.
Those kinds of blanket requests bring out my inner curmudgeon too. I'm tempted to say "what the hell business is it of yours?"
On the other hand, if I've read your ms, and liked it, and want to discuss how fabulous I will be for your career, only to discover that other agents have their mitts on the manuscript too; well, then, I DO ask who has it cause if it's Barbara Poelle, I know to deliver a case of vodka to her office to distract her.