This INDoS COST Action Working Group is dedicated to improving the way neuroimaging data and experimental information are described and annotated. Metadata plays a crucial role in making data findable, interoperable, and reusable, but current practices are often inconsistent or incomplete. This Working Group will extend and refine existing standards, such as BIDS, and foster collaboration between metadata developers, software tool creators, and researchers. By improving metadata practices, WG2 will make it easier to discover, understand, and reuse neuroimaging datasets across research groups and disciplines.