Agent orchestration is the coordination and sequencing of multiple AI agents working together to complete a complex, multi-step task. An orchestrator directs sub-agents, assigns tools, and synthesizes results across independent workloads that may each carry their own identity and access permissions. In agentic AI security, orchestration introduces compounded access risk: each agent in the chain must be individually authenticated, authorized, and auditable to prevent unauthorized escalation or unintended resource access.