What is the primary function of the 'Tag' tool in Revit?

The primary function of the 'Tag' tool in Revit is to label elements with information, such as room names, element types, or other pertinent data. Tagging is essential for documentation within architectural designs, as it allows the user to associate specific information with various components of the model. For example, when you tag a room, you can automatically display the room's name and other relevant details directly in the view, facilitating communication and understanding of the design intent in the construction documents.

Tags ensure that all required information is accessible and clearly presented, enhancing the clarity of drawings and making it easier for various stakeholders (such as clients, contractors, and builders) to interpret the architectural plans. This functionality contributes to the overall efficiency of the design and documentation process by providing a direct link between the visual representation of the model and its associated data.

The other options focus on different functionalities within Revit. Modifying physical attributes pertains to editing elements directly, generating detailed drawings relates to creating construction documents without the emphasis on labeling, and creating visual representations of building systems refers to modeling techniques rather than documentation processes. Therefore, the 'Tag' tool's unique purpose aligns specifically with labeling and conveying essential information within the architectural model.