[Mailman-Developers] Content-filtering - is filtering of content-description possible?

Is in the Content filtering section possible to define only content-type? I suggest that it should be also possible to define Content-description. Because Pegasus Mail for example when is sending an attachment it adds content-descriprion, and mailman filter although removes the attachment itself, it does not remove the content-describtion causing to send to the list a message with the following text content: