An identity used by one actor to act on behalf of another under explicit scope and policy. In agentic environments, this can describe both human-authorised assistants and machine-to-machine handoffs, so the delegation path must remain auditable at every step.
Expanded Definition
Delegated agent identity is the identity context an actor uses when it is authorised to act for another party under explicit scope, policy, and traceable accountability. In NHI security, that can mean a human-approved assistant invoking tools, or a machine-to-machine workflow that temporarily inherits limited authority from a parent identity.
Unlike a standard service account, delegated identity should preserve who initiated the action, what consent or policy granted it, what tools were reachable, and when the delegation expired. That distinction matters because delegation is not the same as credential sharing. Good implementations separate the delegating principal, the delegated principal, and the evidence trail that links both. Industry usage is still evolving, but the governance expectation is clear: delegation must be constrained, revocable, and auditable. That aligns with broader guidance in the NIST AI Risk Management Framework and the OWASP Agentic AI Top 10, both of which emphasize bounded authority and traceability for AI-mediated actions.
The most common misapplication is treating delegated identity as a reusable shared credential, which occurs when teams let an agent inherit broad access without preserving delegation scope or expiry.
Examples and Use Cases
Implementing delegated identity rigorously often introduces orchestration overhead, requiring organisations to weigh auditability and least privilege against added policy enforcement and token lifecycle complexity.
- A customer support copilot opens tickets on behalf of a human agent, but only after explicit approval and with a scoped token that cannot export data beyond that case.
- An AI coding assistant calls internal repositories using a delegated identity tied to the requesting developer, so the change history remains attributable and reversible.
- A workflow engine exchanges a short-lived credential for a downstream API call, preserving the original initiator in the audit log instead of collapsing everything into one service account.
- Security teams review delegated access paths against the patterns described in the Ultimate Guide to NHIs, because broad inherited privileges are a recurring source of exposure.
- For agent handoffs involving identity federation, teams often compare implementation choices with NIST AI Risk Management Framework guidance and the authorization patterns discussed in 52 NHI Breaches Analysis.
Why It Matters in NHI Security
Delegated Agent Identity is important because it prevents authority from becoming anonymous, permanent, or impossible to unwind. When delegation is not explicit, organisations lose the ability to answer basic questions about who approved an action, which scope was active, and whether the credential should have expired. That is a recurring failure mode in NHI environments, where NHI Mgmt Group reports that 80% of identity breaches involved compromised non-human identities such as service accounts and API keys, and only 20% of organisations have formal offboarding and revocation processes.
Delegation also matters because it is one of the few practical ways to let agents operate without handing them standing privilege. Used correctly, it supports Zero Trust-style containment and supports controls discussed in the NIST AI Risk Management Framework and the CSA MAESTRO agentic AI threat modeling framework. Organisational exposure becomes especially visible after a compromised workflow, where investigators discover that actions were taken under a delegated identity but no one can prove the original scope, making remediation and accountability operationally unavoidable.
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 AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-02 | Delegated identities often fail through weak secret and scope management. |
| OWASP Agentic AI Top 10 | A2 | Agentic controls focus on bounded authority and tool-use accountability. |
| NIST AI RMF | AI RMF addresses governance, traceability, and risk management for delegated AI actions. |
Require explicit approval, action logging, and least-privilege tool access for delegated agents.
Related resources from NHI Mgmt Group
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on June 8, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
