While the information about that might be widely available, they are supposed to be available ingame. If a skill description does not accurately give correct and complete information about the skill so players can make a good judgement whether to try that skill but the player has to leave the game and search the internet for accurate information about something fundamental like what a skill really does, then that aspect of the game failed miserably.
And yes, not providing enough information about the game via the games user interface is absolutely the game designers faultâŚ
Edit : oh, its a necrothread⌠didnât notice.