> How is it different from any other legal agreements?
Suppose I tell you a secret. You promise only to share it with others who will keep it a secret. You share my secret with Bob. Bob promises he won't share my secret. Bob shares my secret.
You broke your promise. You tried not to break it. But break it you did.
Suppose I tell you a secret. You promise only to share it with others who will keep it a secret. You share my secret with Bob. Bob promises he won't share my secret. Bob shares my secret.
You broke your promise. You tried not to break it. But break it you did.