To assess the behavior of a command that is used to route calls, the 'list trace VDN' and 'list trace vector' commands are appropriate. 'list trace VDN' traces the call scenario of a Vector Directory Number, which can be involved in call routing. Similarly, 'list trace vector' executes a trace on specific vector steps in the call flow, aiding in understanding call routing behavior. Other commands like 'list trace station' and 'display events' do not directly evaluate the routing aspects of the call.