Finder Comments are accessible, easy to use, and unreliable because they rely primarily on data stored in a hidden file. Regular Comment extended attributes are more reliable.
Metamer
Extended attribute editor with much enhanced interface, app inspection tool, compression tool designed for AirDrop use, and a simple extended attribute editor for Spotlight search.
Unlike file data, metadata has varying persistence. Some is ephemeral, others sticky. macOS has inbuilt mechanisms for managing the persistence of extended attributes.
Tools for editing metadata which is generally well-preserved, including copyright and keywords. Now native on all Macs.
Lightweight metadata editor now runs native on Intel and Apple Silicon Macs.
Supporting 16 different types of metadata, from Authors to Version, you don’t need to know how they are stored, etc.
The Eclectic Light Company 