Abstract: A method of monitoring a storage area within a lock box including: detecting, using at least one of: a load cell sensor or an object shape detection sensor, a physical property of a property access tool within the storage area prior to a showing of a property, the physical property of the property access tool including at least one of a weight of the property access tool or a shape of the property access tool; saving the physical property of the property access tool; detecting an end of the showing of the property; detecting, after the end of the showing, that the property access tool is not present in the storage area; and activating, using a controller, an alert in response to detecting that the property access tool is not present in the storage area.