[otrs] GenericAgent - search through articles, not just initial ticket?

Is is possible to have GenericAgent search through added articles to a ticket, not just the initial ticket? We are trying to catch something in the body of each article that will trigger us making an automatic note. It seems that the search is only looking at the initial tickets and not any other items added to the ticket after creation? I also was hoping to create a filter that would allow us to run this once a day on any new articles added for the day. . .I only see an option to limit by created time. . .not updated time. . . Thanks.