A disclaimer is a renunciation of one’s legal right or claim or a repudiation of another’s right or claim. And the verb disclaim has the corresponding meaning.
But when a party disclaims something (usually warranties), generally a simpler and clearer alternative is available.
The Agent Parties
expressly disclaim liability
It’s relevant that the Uniform Commercial Code refers to what’s required to “exclude or modify” warranties. It doesn’t use disclaim or disclaimer.