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Bounded Agents: Delegation Security for Multi-Agent AI Systems

The paper 'Bounded Agents' introduces the Agentic Principal Chain (APC), an authorization architecture that tracks delegated authority across multi-agent LLM systems and evaluates each request against accumulated session state using six checks to prevent prohibited action combinations and unbounded sub-agent delegation. Evaluated across InjecAgent, AgentDojo, and ASB (3,154 instances), APC reduced AgentDojo exfiltration from 75-100% to 0%, blocked all 544 InjecAgent data-stealing cases, and cut destruction and manipulation rates, with code and data published at github.com/xmuruaga/bounded-agents. Details →
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