Again, this is the standard agreement generally used in most real estate transactions. It is a formal proposal, usually drafted by your real estate agent or broker along with you. If the Seller agrees to all of the terms and conditions in the contract, they will simply sign the document. It then becomes a legally_binding contract between Buyer and Seller.
The second important element is to clearly state the intended parties outcome from the disclosure. In the example above the intended outcome could be "The information is being disclosed to assess whether XYZ transportation company will pilot the software for use within its fleet". Again it is then clear what the outcome and the nature of the relationship will be. The example above is broad enough to allow some flexibility in discussion in the letter of intent e.g. that perhaps the pilot programme is limited to one territory as negotiations progress, but it must be narrow enough that the outcome is reasonably well known e.g. it is not expected that XYZ transportation become a shareholder in the software company.