The Key'vong is known as a vessel assigned to conduct raids along the border between Klingon and Romulan space during times of enmity between those two powers. (Decipher RPG module: Starships) Although most other Vor'cha-class starships are referred to as attack cruisers in canon, the Key'vong and other Vor'cha-class vessels listed by the Decipher RPG as battle cruisers. It is not clear if this is because they are outfitted differently or if the two cruiser terms had become somewhat synonymous.