Retros_x
Adventurer
I prefer to be quite clear and generous with giving information. Making informed decisions makes the best roleplaying IMO. And I definitely tell directly if a situation, dungeon, encounter is more dangerous than usual. Because obviously a wizard tower is dangerous, player expect dangers in a D&D game. But most often they expect it to be beatable or manageable. I think its better to do a bit of "metagaming" instead of letting them run into the disintegration ray that they misunderstood as a knife.