Introduced with Nuance 1.7, PatchCloud was originally a system for tagging and browsing the factory library, and buying and downloading official add-ons to it. All of that’s still in place, of course, but now it also offers tagging and searching (by name only, not properties of any kind) of your local sample and preset libraries.
Drag as many folders of samples into PatchCloud as you like to populate it almost instantly with their contents. Right-click a single sample or multi-selection and select Edit to open a hierarchical tag editor, drilling down through Type, Category, SubCategory and Tag. A number of suggestions are already in place (‘Keys’, ‘SFX’, ‘Wood’, etc) and you can create as many new tags at each level as you like. Active tags appear at the top of the PatchCloud panel, and selecting them filters the sample list down to only the sounds with those tags assigned. It’s a straightforward setup and a useful utility.