AI Agent Tool Scoping: The Blast Radius Control That Agent Frameworks Do Not Enforce
AI agent frameworks let the model choose from the tool set the developer registered. What the frameworks do not enforce is which tool the calling identity is authorized to use in which context. When a prompt injection attack succeeds, the blast radius is the intersection of the tool set the framework registered and the authorization the calling application forwarded. Tool scoping is the control that shrinks the intersection.
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