The description attribute handling requirement is
a custom media type in the Accept header:
application/vnd.github.symmetra-preview+json
Limitation: Repository.get_labels does not report description,
possibly something has changed in the preview API.
This is a minor thing. It’s a convention, not a rule (obviously)—but it’s also a best practice.
Many text editors look for this kind of comment as the first line—or second line, if there is a shebang (the `#!/usr/bin/env python`, or whatever else)—and make use of this to determine the file’s encoding.
Mateusz Loskot