TinkerTool is an application that gives you access to additional preference settings Apple has built into macOS. This allows activating hidden features in the operating system and some of the applications delivered with the system.
The tool makes sure that preference changes can only affect the current user. You don't need administrative privileges to use the tool. With this design, it is no problem to use TinkerTool in professional networks where users have restricted permissions. The program will never change any component of the operating system, so the integrity of your system is not put at risk, and there will be no negative effect on system updates. The application sandbox of macOS additionally guarantees compliance with these security rules.
All preference settings changed by TinkerTool can be reset to Apple's defaults or to the state that existed before using the tool. No dangerous background processes are used for TinkerTool's operation.