Integrating a description editor into the file browser

I want to track a description along with each uploaded file by either creating a plugin or using the SelectFunction to show a dialog when the user selects an uploaded file.

I can do all this with a plug in and load / save via a json proxy to my database based on the file name as a key, but has anyone else done something similar? It seems it might be a common requirement and I don't want to re-invent the wheel.

Or is there a better approach than creating my own plugin (based on the dummy plugin)?

Thanks in advance