Its purpose is to sort messed-up interwiki links like, for instance, the link to la:Categoria:Ars grammatica from Kategorie:Sprochwüsseschaft that I have fixed - it linked to the article for no linguistics but grammar, thus obstructing further automatic interwiki updates to take place.
The task cannot be done automatically, so I manually choose what do delete and what to keep. This is not a automatic bot, but rather an assistant of manual jobs. Its behavior could be arbitrary.
Since it's all guided, the edit rate will be very slow - it should edit no more than around 5 articles per hour.