MessageHelpEntry

One message command as the built-in help shows it: how to type it, what it does, and where it works.

The command as the caller types it here, such as !mute <target> [duration] [reason…].

The words that name the command, such as mute, or '' for a pattern that begins with a param.

What the command does, from its handler's description.

Its aliases and other spellings, as the caller types them, such as !m.

Where it works; a command with a member, role or channel param works in servers only.

Each param and flag, with what it takes.

The class and method that handle it, by name.