A permission boundary limits the resources and actions available to a software component or agent. For agentic systems, it helps constrain activities such as scheduling meetings, querying customer data, or drafting messages on a user's behalf. section 10.24
Permission boundaries are one layer of defense against prompt injection and other attacks that can reach filesystems, cloud APIs, memory, or other powerful tools. They work alongside input filtering, memory segmentation, anomaly detection, rate limiting, and human oversight, but remain imperfect under adversarial pressure. section 8.22
Constrained workplace automation
An assistant may schedule a meeting or query customer data, but permission boundaries help limit which actions and resources it can access. This matters when a mistaken action could affect business decisions or expose sensitive information. section 10.24
