Which of the following tools requires the least amount of time to administer during patient consultations?

The Brief Health Literacy Screen is designed to quickly assess a patient's health literacy. It typically consists of just a few questions that can be answered in a short amount of time, making it efficient for use during patient consultations. This quick assessment allows healthcare providers to gauge a patient's understanding of health-related information without requiring extensive time commitment, which is critical in busy clinical settings.

In contrast, the other tools mentioned generally have more extensive formats. For example, the Short Test of Functional Health Literacy in Adults and the Health Literacy Questionnaire typically involve longer assessments, which can be more time-consuming to administer and analyze. The Rapid Estimate of Adult Literacy in Medicine, while also quick, still takes more time than the Brief Health Literacy Screen when considering the overall patient interaction scenario. Thus, the Brief Health Literacy Screen stands out for its efficiency in providing immediate insights into a patient's health literacy without lengthy administration.