Without seeing the previous exchange it's impossible to say whether her response was justified!
Bear in mind though that even if you thought you were just making a reasonable request for extra detail, it may have come across as timewasting or would-be sexting. There are apparently a lot of fantasists, voyeurs, phone pests and piss-takers who exist alongside genuine punters. Unable or unwilling to actually go through with a punt, these guys will instead try to get the SPs to send long descriptions of their appearance and services, or angle for free photos "so I can tell you're genuine", presumably so they can have a free wank insted of paying for a punt. Understandably, SPs object to being used as free sex chatlines.
One girl I saw had a particularly strict and onerous system of comms and vetting, and when I brought this up to her post-punt she said that as much as 75% of her incoming comms were from trolls, wankers and general timewasters.
So, assuming you're a good egg, don't take snappy SP comms personally, either just move on or use more precise language setting up a punt to distinguish yourself from the wrong'uns.