A character with this skill who makes a successful Int test will know who is on whose side, what rumours there are about their intrigues, and will have all the necessary contacts to persue any kind of intrigue of their own. If the character successfully makes an Int test iwth more than 20% to spare, he or she will also be privy to a secret about some faction's plans that could prove very useful.
Obviously, such a skill can only be used at a level appropriate to the character's own. A Rank 3 Noble could use this skill in connection with people and events at the Electoral court, while an Elector would operate like this at the very highest level.