A toggle should look like a on/off switch and we should avoid state-action ambiguity.

For example :
On access screen, the button "Activate" has an action verb as label but a state value as decorator. So when a message is activited the button toggles to a forbidden signal. At that moment if I whant to disable it, I know this button should make that I want to do but when I have clicked on the button, it toggles to a checked signal like if I have just activated it. That is so confused.