What you did here is basically what you want to do. I'd think about taking out that third paragraph and expanding a bit on the first two. You ideally want as few names/proper nouns as possible since they can get confusing. I was on board until Jorsh and Gort showed up; then I was just confused. Are they the monsters Sally is after?
On rereading it, yes, it seems like they are.
Not sure how to really fix that bit, since I was a hair confused and that's sorta the last thing you want an agent to be. But most agents are probably smarter than me so
I'd say flesh out that paragraph a bit more--which one is the giant racoon?--and see if that helps.
As to your last paragraph, it's basically what I'm doing with my current one. If you have any blatant forms of inspiration for it, maybe detail those, but up to you there. For my first book--high fantasy with talking animals--I namedropped Brian Jacques and
Redwall to kinda explicitly let agents know what they were getting into if they already didn't understand my talking-cat protag.
Keep in mind that agents will ask for different things in a query letter. Some will want a bit of an author bio to go along with everything else, while others will specifically state, "TELL ME WHAT SETS YOURS APART." Once you get a prefect draft of your query letter, draft two more with those bits added in. Copy/paste the one you need as you go through a database (or three) of agents.
Uh. Last thing: My novel was rejected all over the place, and a few agents were kind enough to rudely tell me why: I'm a noobie author with a BIG book. No publishing credits and over a 100k words will make some deny you on the spot. Shit sucks, but you know, best to know up front until some jackass tells you, "That word count is just begging me to deny your submission [lol]"