Employees are increasingly using generative artificial intelligence (GenAI) tools to facilitate and automate work processes. While this may seem beneficial at first glance, employees are also prone to (un)consciously sharing sensitive information, putting organizations at risk. So far, we lack insight into what drives disclosure behavior with GenAI tools. Drawing on construal-level theory, this study examines how psychological distance influences such behavior. Our survey of more than 198 working GenAI users suggests that social proximity as well as spatial, temporal, and hypothetical distance positively affects disclosure behavior. Our findings not only contribute to the current literature on GenAI but also help practitioners to understand how employees share sensitive information with GenAI tools.