Agent Identity vs. Service Accounts: Why Scoped Tokens Still Need Runtime Authorization

The text explores the nuanced decision-making required when representing AI agents in enterprise Identity and Access Management (IAM) systems, focusing on the balance between using service accounts with scoped tokens and the need for runtime authorization. It explains that while scoped tokens provide necessary authentication and coarse boundaries, they fall short in ensuring that specific actions should be executed at a given time. AI agents differ from traditional machine identities as they make decisions at runtime, requiring a more dynamic authorization model that includes delegating human identity, session context, and trust levels. The text stresses the importance of zero standing permissions, where permissions are evaluated in real-time per action, as opposed to relying solely on pre-issued token scopes. It highlights the need for detailed logging to capture the full identity and decision-making chain to ensure accountability and auditability in agent actions, advocating for a model where runtime policy evaluations are central to authorization decisions.