I've always found it awkward to have characters enter into a game that isn't suited for their type of character. For instance, having a party that are mostly combat oriented attempt an espionage scenario like "The Disappeared". It can lead to boredom for those players and jeopardize the mission because they don't have the necessary abilities. Further, thinking about the in-game world, the Venture-Captains would try to choose Pathfinders suited to the task they need accomplished.
Is it legal to let the players know the style of a scenario prior to playing it so they can decide if they want to play it?
For example: If I were to run "Library of the Lion", I might tell them that it is light combat, heavy skill checks, etc. Nothing that would give away the content necessarily.