Its purpose is to sort messed-up interwiki links. For instance, the link to sl:Venera from Venera that I have fixed  had been linking to not a disambiguation page but an article for the planet, and it links back to Venera (planet), hence 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.