A confidentiality agreement puts each party on notice that what is being discussed is solely for each party and only for the stated purpose within the agreement. The critical elements within the confidentiality agreement are therefore that parties must specifically state the type of information that is being disclosed and also the intended purpose for which the information is to be used.
For example, I usually buy houses directly from sellers, but last week I started to make some creative owner financing offers for some houses through real estate agents. Once I was able to talk to the agents representing me, they immediately saw the benefits of my offer to some sellers. Unfortunately, the agents I talked to would be presenting my offer to another agent that represented the seller.