Continuing the discussion from >DROP ALL … What do you want to drop those things in?:
This part made me wonder about those verbs so I tried it out (after checking that the DROP ALL thing worked!)
>drop all You don't have anything to drop. >put all into bench There are none at all available!
This seems to fix it, based on something I use for “GET/TAKE ALL” (which I probably picked up here):
Rule for printing a parser error when the latest parser error is the nothing to do error and the player's command includes "put all" or the player's command includes "insert all": say "You are not carrying anything." instead.
>put all into bench You are not carrying anything.
I’m adding this potential solution here as I wonder whether there is a better way