Mail sent to the Author in care of the Literary Agent may be opened by the Literary Agent and dealt with, unless it is apparently of a personal nature, in which case the Literary Agent shall forward it to the Author promptly. When the Author is approached directly by any party interested in the Author's Represented Works, the Author shall inform the Literary Agent immediately and refer the party to the Literary Agent. This Agreement contains the entire agreement between the parties hereto. It supersedes any prior agreement, and may be amended in writing by mutual consent. Many authors already have an existing written or handshake agreement with an agent and may not wish to impose most of this sample contract.
Many agencies use their own contract, and there's certainly nothing wrong with that.
We recommend, though, that you use this model as a guide to remind you to make sure terms you feel are important are addressed satisfactorily in whatever contract you do sign. In the event that the Literary Agent dies, leaves the agency business, or commits a substantial breach of this agreement, the Author or his heirs and assigns may revoke all rights granted to the Literary Agent hereunder.