Earlier this week, MLB announced some pace-of-play changes for the coming season. Teams will be limited to six mound visits (by anyone: manager, coaches, even the catcher or an infielder) per nine innings.
Pitching changes will not count against the total. And, as SB Nation's Whitney McIntosh reported, teams "won't be penalized for a mound visit if a pitcher might be injured, or after an offensive substitution. Expect a lot of managers to start practicing their 'my pitcher might be injured oh nope look he's fine now but that was a good chat' faces".