Agent identity answers three questions. First, does the workload prove it is genuinely the agent it claims to be. Second, who authorised this agent to act, and on whose behalf. Third, what is this agent permitted to do right now. Established patterns answer each question without new invention. 

SPIFFE and SPIRE issue cryptographic identities to workloads automatically at startup, so agents run without shared, unrotated service accounts. On behalf of token exchange preserves the original user identity across multi agent chains, so every downstream call carries a verifiable record of who initiated it. IAM roles apply least privilege at each step, restricting agents to defined actions such as read only access.

Together, these three pillars give platform teams full observability. Denied requests, blocked pods and token exchanges all appear in one view, so teams catch misuse early and scale agent deployment with confidence.

As agentic systems move from pilot to production, identity architecture becomes the foundation that makes scale possible. Enterprises that get this right now build the trust their agents need to operate freely, at any volume.

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