Offer suggestions for descriptions on new stories
When you create a new story, offer a few suggestions for what to put into the "description" field. These would essentially be story ideas suitable for the genre that can (a) show what types of stories players can play with this deck, (b) give narrators an easy entry point and the ability to just "click and go", and (c) give narrators some inspiration rather than a blank slate.

FYI, when you create a new game by choosing one of our starter worlds, your game now automatically gets a default description. You can then edit it as much as you like, but the requirement itself is automatically met.