I've noticed places in Toril without any sort of description. When I searched about it online, not even the Forgotten Wikia had anything about some of these places.
Let's use the Kryptgarden as an example.
It's an intriguing name, I would say. My players wanted to know about it. The name of the forest made them cautious.
I checked the book, I checked other books about Forgotten Realms, then the Forgotten Wikia. There's literally nothing about Kryptgarden. Not that I could find anyway, so I told them "A long time ago, there wasn't a forest. Some people say there was a war in the same spot and from the dead bodies, a giant garden was born. The garden is now the forest known as Kryptgarden"
It even sounds kinda cool or whatever but, the point is, was Kryptgarden not given a better description so the DM would create something about it? What about the other places in Faerûn that lack description?