A reinforcement tool refers to something that helps strengthen or support something else. It can be a device or method used to make something stronger or more effective. Full definition
To enhance humane animal care by focusing on improved caregiver skills through knowledge, practice, and the use of positive reinforcement tools. (kenramireztraining.com)
Apps can be awesome reinforcement tools to support live or online training that is more «traditional» (e.g. take it on a laptop, click through lots of content). (theknowledgeguru.com)
For continued learning support, it is an efficient reinforcement tool. (gc-solutions.net)