Basic descriptions aren't necessary but helping in a lot of cases. And in some it's completely the same ("I want to roll an insight check" vs. "Do I believe his story?" - there's simply no describeable process making a difference).

Also players are different... I won't punish a guy playing a high int, high charisma character for not coming up with a logical or persuasive argument (and again "I want to talk to him to change his mind" vs. "I want to roll for persuasion" is all the same here), just as I don't punish a nerd playing a barbarian for not actually being able to lift a person one-armed.

But then I know my players and assume new additions are acting in good faith to their best ability and not just roll-playing because they want to have more time to focus on Candy Crush.