In the play “Hamlet,” Polonius sends Reynaldo to Paris because he wants to know if Hamlet is truly mad or faking it, if Hamlet is safe, and if he is committing any crimes.
Polonius wants to know if Hamlet is truly mad or faking it so that he can decide how to proceed with his plan to have Claudius kill Hamlet. If Hamlet actually has gone mad, Polonius will want to leave him alone, but if he’s just pretending, then Polonius may want to help him out of his “madness” so that his plan can go ahead without a hitch.
Polonius wants to know if Hamlet is safe in Paris because he loves his son and does not want anything bad happening to him. He also worries about what will happen if Hamlet returns home and continues acting crazy—can he be trusted around Ophelia and other people?
Polonius worries about the possibility of Hamlet causing trouble for the king and queen because they are important people in Denmark who need protecting from any harm that might come their way.