Mr. Coro has the details on the Jones signing and the details are good.

azcentral.com blogs - Coro's Suns dish - PaulCoro - A Jones for the Suns' big man jones
The Suns took little risk in bringing back Jones. The structure of the one-year deal pays him a small amount to come to training camp and another small portion if he makes the opening night roster. The Suns would have the ability to waive him at no extended cost all the way up until the January date that contracts become guaranteed.