What do the pair fail to reveal to Claudius?

In Shakespeare's "Hamlet," Polonius and Reynaldo fail to reveal to Claudius the true nature of Hamlet's madness and the underlying reasons for it, particularly its connection to his father’s death and Gertrude’s hasty remarriage. Instead, they focus on superficial observations and rumors about Hamlet's behavior, attempting to gather information without disclosing the full context of his distress. This omission contributes to the misinterpretation of Hamlet's actions by Claudius and others at court.