Yeah we could put in a help command.
The addon page (https://www.askmrrobot.com/addon) links to a blog post describing the basics of using it (Addon Help – Ask Mr. Robot) which in step 3 tells you about the /amr show command.
There is also a /amr hide command, and a /amr toggle command (which hides the window if shown, or shows if hidden).
/amr reset will reset all of your options and the window position to default.
The only other command of real interest is explained directly on the Gear tab in the addon, the /amr equip command.