"? - if unspecified doesn't
"Downwind" mean "for the active runway in the published circuit direction for that runway"
"Base" mean "for the active runway in the published circuit direction for that runway"
If I'm doing something non-standard I'll put in the runway or direction but otherwise why clutter up airtime? "
Never flown to or from an airfield with 'Circuits. Variable'?
With no-one manning the radio.