It would be cool if there was a machine-readable way to represent various Mastodon server rules.
Then they could not only be filtered by such rules on directories like instances.social, but apps could display summaries when displaying a sign up screen.
I imagine it might work a bit like rubocop rule names (e.g. "Style/FrozenStringLiteralComment") but I don't know how practical this idea is. Don't take this as me planning to do it, just sharing thoughts.