A confidentiality agreement, often referred to as a nondisclosure agreement (NDA), is a legal agreement between two or more people. Confidentiality agreements are very useful to prevent unauthorized disclosures of information, but they have inherent limitations and risks.See Page 2, 1st paragraph: "All proposals are due in the Tarrant County. It is requested that the Commissioners Court approve an Information Escrow Agreement between. NDAs, or non-disclosure agreements, are legally enforceable contracts that create a confidential relationship between a person who has sensitive information.