When should an AI assistant forget a saved location?

Google says an upcoming Find Hub feature will let Gemini save where people placed items such as spare keys or passports, with an optional photo. That is useful right up until a travel note becomes household fact. “Passport is in the blue backpack” may be true for one trip and wrong six months later. A saved location needs a shelf life. Show when it was saved, let people mark it as temporary, and make an old memory sound old instead of certain. Otherwise the assistant turns one helpful answer into a very efficient search of the wrong room.