A mechanical torque wrench including a wrench body defining an elongated interior compartment and a wrench head including a bar extending therefrom being pivotally secured to a first end of the wrench body. The device responds to the request by applying the optimum methodology to propagate one or more commands to each intended target appliance to cause each intended target appliance to perform the intended one or more functional operations. The method includes computing an access control expression corresponding to each persistent object according to the metadata, wherein the access control expressions are string-representation Boolean expressions, and storing the access control expressions.