1. A computer-implemented method comprising: determining, by a monitoring device, that presence data associated with a first item meets one or more criteria associated with adding the first item to a first list of items whose presence is monitored in a first particular context; in response to determining that presence data associated with the first item meets the one or more criteria associated with adding the first item to the first list of items whose presence is monitored in the first particular context, adding the first item to the first list of items whose presence is monitored in the first particular context; determining whether the monitoring device meets one or more first context criteria for the first particular context; determining, when the monitoring device meets the one or more first context criteria for the first particular context, whether the first item is located within a first predetermined distance of the monitoring device; determining a type of alert for the first item using the first predetermined distance in response to determining that the first item is not within the first predetermined distance of the monitoring device; providing, by the monitoring device, the type of alert for the first item in response to determining the type of alert for the first item using the first predetermined distance; determining whether the monitoring device meets one or more second context criteria for a second particular context different from the first particular context; determining, when the monitoring device meets the one or more second context criteria for the second particular context, whether a second item is located within a second predetermined distance of the monitoring device, the second item being on a second list of items whose presence is monitored in the second particular context, the second list of items being a different list of items than the first list of items; and not providing an alert regarding the second item in response to determining that the second item is within the second predetermined distance of the monitoring device.