Its purpose is to sort messed-up interwiki links. For instance, the links in Hawaii that I have deleted had been linking to not a disambiguation page but an article for the state, and linked back to Hawaii osariik, 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.