This must be one of Mike's picks, so let's see how it turns out.
On the surface, it looks like a bad trade. He needs to be resigned next year, gave up a 4th, and a serviceable player for him. Baker was a 3rd round draft pick, and Jones was a 3rd round draft pick, so we are losing a 4th out of this deal.
I don't like it, but maybe coach sees Jones as a key player moving forward. I propose that the Seahawks hire Bill Belichick for General Manager (if he would go for it), that guy always seems to find trading partners, who are suckers.
Titans win trade, unless Jones turns out to be a leader on defense. That's my take.