Or it should be flexible.
Use of prescriptive or descriptive can depend on context. Many people who use a lot of slang or expletives with their mates down the pub are often able to adapt during a job interview.
We all know the term “grammar nazi” - which is basically somebody being prescriptive in contexts that are not appropriate. I don’t go up to the greengrocer and berate them for their sign saying “Apricot’s 5 for a £” but when it comes to using text in the context of publications, especially those written in a language that may not always be the readers’ first language, I believe it’s a good thing to be prescriptively correct.
ClassicPress is software that falls within such a context. A huge percentage of its users will be professional writers or aspiring writers. Its logo is even a writing implement.
So fewer details or less detail please.