Aside from actual experience breaking my foot and then playing the sport?
Life After Surgery – BC Foot and Ankle Specialists []
Over a year for movement to improve. That would explain some reports saying that he is still taking it easy with planting on that foot.
There's also what Chatham said regarding how the bones "move around" differently after surgery. There have been hosts of physicians that have commented on how important it is for skill position players, particularly wide receivers, to fully heal from foot injuries. Then, finally, the proof is in the pudding. Not even two full practices in and Edelman has a setback (albeit minor) on the surgically repaired foot. If we're speaking in pure probability, is the probability that Edelman reinjures his foot higher with rest through the preseason or is it higher with him practicing. Of course you would say it's the latter. But we shall see. If I'm right, and I think I am, the team will deactivate Edelman for the preseason at the most or until the final week after the very least to ease him into getting some reps. I highly doubt they want to play with fire again.
The thing is, speaking from experience, you can tell the doctor whatever you want from a pain standpoint. In the end, they only know as much as you give him. And he already tested the foot. The moment of truth already arrived. The result is possible torn scar tissue at the very least or another minor setback.