I don’t think I understand why you’re taking about about descriptions etc or why this is necessary for Solid on Safe.
Solid at its core is not a particular kind of pod, but a protocol which includes LDP which allows data to be stored on something we call a pod. A pod does not have to be implemented using a server, what’s needed is something that implements the Solid protocol, however that is achieved.
To put Solid on Safe (without servers) you need to implement the Solid protocol, and I demonstrated how this can be done for LDP, a subset of the protocol with Safe rather than a server providing the storage.
I’ve made a presentation and demo of this, so maybe that’s useful for understanding the approach I used, and understanding how it works. This enabled me to take more than one Solid app and run it without a pod server, using Solid on Safe instead. See: