A multinational corporation is migrating its legacy document repository to a modern cloud-based records management system. The organization operates under stringent data protection laws, such as the GDPR, and aims to ensure long-term archival and retrieval of its digital assets. The proposed metadata strategy for the new system primarily focuses on descriptive attributes like title, author, and creation date, with minimal emphasis on administrative or structural metadata. Considering the imperative for interoperability with existing archival infrastructure and the need to demonstrate compliance with data privacy regulations, what is the most significant deficiency in this metadata strategy?