I decided to take a couple photos of the parking brake latch mechanism both partially and fully engaged. I also took pics of the parking break lever in the partially and fully engaged positions. The latch photos were taken through the cutout in the left side floorboard and demonstrate a couple things. First to show is it quite easy to take a quick look at the latch when getting off the tractor. This allows a visual confirmation of proper brake engagement. Second to demonstrate the position of the handle is not a good indicator of engagement.
The first and third attachments are the brake partially engaged. In this position the brake is prone to slip off the rounded edge of the tooth and disengage. The second and fourth attached pics are the brake fully engaged. In this position there is no chance of the brake disengaging as the geometry of the teeth require the brake pedal be further depressed to release the latch.
I am in the habit of visually checking the brake engagement as I get off the tractor. It does not take any extra time to look through the cutout and then you have piece of mind is brake is not going to release unintentionally.