That all depends on whether the clutch has a built in blade brake.......or not.
Clutches without a blade brake feature should be able to free wheel when the clutch switch is OFF.
The description as "Craftsman GTY 5000" does not provide enough data to determine anything about this specific tractor. To get specific data we need the technical model number from the chassis beneath the seat. Typically this number begins with 917xxxxxx.

Ok, sorry it is a GT 5000 Model #917.276360

Additional info: I looked in the manual that I downloaded and when referencing the attachment clutch the manual says it has a built in brake. The info below was copied from the manual. Mownie, I take it from your response that if it does have a brake then there should be some resistance or drag when the clutch switch is off. Is this correct or am I making the wrong assumption? Thanks

The electric clutch should provide years
of service. The clutch has a built-in brake
that stops the pulley within 5 seconds.

Yes, the brake should make it very hard, if not impossible, to turn.

Mownie, thanks very much for the info.