1. A method, comprising: receiving, from a set of input devices, data of an environment surrounding a computing device, wherein the received data comprises a captured image depicting an object in the environment; determining a current context of a discussion based on the object depicted in the captured image and a timing schedule specifying a list of planned contexts; receiving a request to perform an operation on the computing device; determining a context of the requested operation; determining a measure of relatedness between the current context of the discussion and the context of the requested operation; determining the measure of relatedness does not exceed a predefined threshold; and restricting execution of the operation.