* Ophelia is driven mad by Hamlet's actions and the death of her father. She is not in a state to clearly communicate or understand the situation.
* Ophelia is manipulated by Claudius and Polonius. Claudius uses her to spy on Hamlet and tries to control her actions.
* Ophelia's death occurs before she has a chance to reveal what she knows or saw.
It's important to note that there are different interpretations of the play, but the dominant understanding is that Ophelia does not tell Claudius about Hamlet's actions.