tool for the slightly morbid inclined, informs you who "Find a Grave" knows to have deceased. The method in this madness is that Wikidata has items by the same name, they should have the same expiration date when it is about the same person.
When you run the tool, you are provided with information as available in Wikidata. The kind of things you find are people not known to be dead. You find articles that should be merged. There are also people that do not have a Wikipedia article.
Tools have different applications, even a tool about the dead has life in it.