I'm surprised by a NDA that wont even allow you to disclose that you performed a project that did some certain things, or that you performed an undisclosed project for X Company, and then a list of the technologies involved.
I do disclose technology and general themes involved but frequently the contact says I cannot mention company names or individuals involved. Also even when I can, I cannot show the result of the projects to potential clients. Therefore, I only have 1 project in my portfolio showed to clients...