Passwords Stored in Cloud?

Once I have uploaded my pw to the cloud and placed them under a strong master password, is it possible to control them... that is... is it possible to activate and de-activate this feature at will? In other words, is there a setting where I can examine the pw stored in the cloud and decide (i.e. during a period of absence) that I want to "turn this off" so that no one including myself can activate this until I "turn it back on"? Thanks.