# Adding Tags to a Tool Block

Tags are the means in which data is exchanged between a Tool Block and the rest of the application. There are two different methods that may be used to assign tags to a Tool Block. One method is to use the VisionPro Tag Manger, which will create nested tags within the Task > Tool Block structure. The other method is to add tags to the Input/Output pins of the Tool Block in the Task, which will pass the tags to the top level of the Designer Tag Manager.

Note: Tags created using the VisionPro Tag Manager are not available in the Designer Tag Manager.