The clearest sign is an audit log that records only the agent or a shared credential, with no human in the chain. Another warning is that revoking a user does not revoke the agent’s access, which means the session is standing on its own. If incident review starts with a hostname instead of a person, the delegation chain is missing.
How to tell the proxy is only logging the agent, not the human decision-maker
A meaningful attribution proxy should preserve the delegation chain, not collapse it. When the log entry shows only an agent name, a shared service account, or a hostname, you are looking at telemetry that can describe activity but not accountability. That becomes a real problem when you need to answer who approved the action, who owned the session, and who must be contacted after an incident.
Another tell is that the record lacks a durable link back to the initiating person or the original policy decision. If the proxy cannot distinguish between “the agent acted” and “the human authorized the agent to act,” it is not giving you attribution that is operationally useful. The system may still be routing traffic correctly, but the trust chain is too thin for review, audit, or containment.
Because this is really about access delegation, the evidence you want is not just request volume or tool usage. You want a log trail that ties the action to a person, a session, and the authority under which the agent operated. Without those three anchors, the proxy is reporting execution, not meaningful attribution.
What breaks when revocation does not follow the human relationship
The clearest failure mode is when removing a user, disabling a human account, or ending an approval does not stop the agent from continuing to act. That means the proxy or downstream credential model is holding a standing capability that outlives the person who should have governed it. In practice, the agent has become the durable principal, which makes incident response and access review much harder.
This is especially visible when shared credentials, long-lived tokens, or opaque session handoff are doing the real work behind the scenes. If revocation only affects the human layer while the agent’s access remains valid, then the control boundary is misplaced. The proxy may be technically functional, but it is not enforcing human accountability in a way that stands up to scrutiny.
A second warning sign is that the same access path can be reused across multiple users without a clean per-user audit boundary. That often shows up as indistinguishable entries for different operators, or as a single privileged identity that several people can trigger. Once that happens, attribution becomes an inference exercise instead of a defensible record.
When incident review starts with infrastructure instead of a person
If your first forensic clue is a hostname, container ID, or service label rather than the person who delegated the action, the proxy has hidden the decision chain that matters most. That is a sign the system is optimized for routing or automation, not for accountability and review. In a real incident, that gap slows containment because responders must reconstruct who was responsible before they can judge whether the action was expected.
Meaningful agent attribution should also make exceptions visible. You should be able to tell when an agent acted within a known approval path versus when it executed under a residual or shared authority. If those cases look the same in the logs, the proxy is not giving you enough context to separate authorized automation from potentially unsafe reuse.
The practical test is simple: after a revocation, a pause, or a policy change, can you still tell whether the agent’s authority came from a specific human decision? If not, the attribution layer is too coarse for governance, and the audit trail is too weak for fast investigation.
Risk and Threat Considerations
Weak attribution turns delegated access into a governance blind spot. If the proxy cannot preserve the human-to-agent chain, attackers or careless operators can hide behind shared sessions, durable tokens, or indistinguishable service identities, making misuse harder to detect and harder to assign.
Failure mechanism: The proxy records execution but loses provenance, so revocation, review, and incident reconstruction no longer map back to a specific person or approval path.
Impact: Unauthorized actions can persist after the human relationship ends, and response teams may waste time tracing infrastructure instead of stopping the right access path.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 and OWASP Agentic AI Top 10 address the attack and risk surface, while NIST SP 800-53 Rev 5 sets the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-04 — Insecure Authentication | Meaningful attribution depends on binding agent actions to revocable authority. |
| NHI-07 — Long-Lived Secrets | Standing tokens or secrets can let agent access survive human revocation. | |
| NHI-10 — Human Use of NHI | Attribution fails when humans and agents share or blur the same authority trail. | |
| Recommendation — Require per-actor authentication paths that preserve who delegated each agent action. Rotate or expire secrets so agent access ends when human authority ends. Separate human approvals from agent execution paths and keep both auditable. | ||
| OWASP Agentic AI Top 10 | ASI03 — Identity & Privilege Abuse | The issue is loss of provenance and privilege boundaries in delegated agent action. |
| Recommendation — Bind agent privileges to explicit human delegation and revoke them with the session. | ||
| NIST SP 800-53 Rev 5 | AU-2 — Audit Events | Audit logs must capture the delegation chain, not only the executing agent. |
| Recommendation — Log the approver, acting identity, and session context for each delegated action. | ||
Practitioner Guidance
What to verify: Confirm that every agent action can be linked to a named human approver, a bounded session, and a revocable authority source. If any one of those is missing, treat the attribution model as incomplete even if the proxy is producing detailed logs.
Common mistake: Teams often mistake a searchable audit log for meaningful attribution. Logging the agent’s identity is useful only when it preserves who delegated the action and when that delegation expires.
Decision rule: If revoking the human does not reliably remove the agent’s ability to act, the design should be treated as standing privilege, not delegated access.
Practitioner takeaway: The proxy is doing the job only when it can answer not just what happened, but whose authority made it possible and whether that authority still exists.
Related resources from NHI Mgmt Group
- What are the signs that an automated pentest is not giving you meaningful coverage?
- Why is single-provider AI agent governance not enough for enterprise security?
- How can organisations reduce the blast radius of compromised agent identities?
- What problem does ownership attribution solve for service accounts and API keys?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on September 25, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
