While it is true if there is intelligent life there, they may not have radio communication, why would we not want to send a message? If there is life that has radio communication, surely they've heard some of our transmissions. All this would be is, we know your system has planets. It would only take about 10yrs to get a reply if there is one. Start with prime numbers. Then I guess a mathematical model of their system as we know it and of ours.
I know we've been listening for decades. But I don't recall reading any serious attempts at sending messages to some of our neighbors. If we haven't, our nearest neighbor is a good place to start.