What effect does Hamlet’s wit in scenes two and three have on the dramatic tension of the play? Is Hamlet’s wit entirely frivolous?

Hamlet cleverly dances around Rosencrantz and Guildenstern questions about Polonius’ whereabouts. He uses his wit to verbally spar and defeat his two friends who are ill equipped to handle Hamlet's wit. I think Hamlet has an edge to him here. He is rebelling against his friends' using him for information. This is Hamlets style of rebellion; it is a style that is psychological rather than violent.