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An AI agent that can call APIs, use tools, and act across business systems is a software actor—not just a chat interface. Securing it starts with giving it a distinct, attributable identity, limiting what it can do, controlling its credentials, and recording its actions.
The practical goal is to connect each agent to the person, service, or organization responsible for it, while making its authority narrow enough to manage and its activity clear enough to audit.
Why does an AI agent need its own identity?
An agent can perform actions in several systems, sometimes with limited human supervision. If it operates using a person’s account or a shared service credential, a log may show which credential was used without establishing which agent acted, who sponsored it, or what task it was meant to perform.
NIST Cybersecurity Insights authors Bill Fisher and Ryan Galluzzo put the principle plainly: “Credential sharing is a bad idea in all contexts.” Sharing a human credential can let an agent impersonate its user and make it harder to establish accountability for actions. NIST Cybersecurity Insights, August 27, 2026
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Assign each agent a unique identity and credentials rather than treating it as an extension of whichever employee happens to launch it. Bind that identity to its sponsor: the user, service, or organization operating it. That relationship helps administrators answer two separate questions: which agent acted, and who is accountable for its deployment and delegated authority?
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The identity should be usable across the systems the agent is authorized to access, while preserving attribution to the agent and sponsor. A name in a registry alone is not enough if the systems receiving API calls cannot authenticate the agent or associate its actions with that identity.
How can zero-trust principles be applied to agent authorization?
Zero trust does not mean granting an agent broad access because it is inside a company network, was approved once, or is associated with a trusted employee. Authorization should be evaluated for the agent’s identity, the task, and the resources it needs. NIST identifies a particular challenge: an agent’s required actions may not be fully predictable in advance, so least privilege must be managed as capabilities and context change. NIST Cybersecurity Insights
Delegate only task-appropriate rights
Start with the smallest set of permissions that lets the agent complete its intended task. Limit which systems, data, and operations those permissions cover, and review them when the agent’s purpose or operating context changes. Sponsorship should not silently transfer all of a human user’s entitlements to an agent.
Where actions are uncertain, avoid solving that uncertainty by granting permanent, unrestricted access. Define boundaries for the agent’s role, assess which operations have significant consequences, and ensure the authorization model can be reviewed and adjusted as the deployment evolves.
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Reserve human approval for consequential decisions
A human approval step can be appropriate for a high-impact action, but prompting for every routine step is not a reliable safeguard. Repeated prompts can cause consent fatigue and reflexive approvals. NIST also cautions that elicitation mechanisms can be used to solicit credentials or sensitive information. Approval design should therefore make the action and its consequences clear, and focus human attention where a decision can meaningfully reduce risk. NIST Cybersecurity Insights
How should agent credentials be issued and protected?
Static API keys and bearer tokens create a central risk: possession of the secret can be enough to use it. They may also grant broader API access than a particular agent needs. A credential does not, by itself, establish the identity of the person or process holding it. NIST Cybersecurity Insights
- Issue credentials to the agent’s identity. Avoid embedding a person’s password, token, or other shared account secret in an agent.
- Limit credentials to the required access. Match permissions to the agent’s task rather than using a broadly privileged key for convenience.
- Manage the full credential lifecycle. Define how credentials are issued, rotated, and revoked, including what happens after suspected exposure or when an agent is retired.
- Make revocation operationally usable. Teams need a way to identify the affected agent and remove its access promptly, rather than relying on ad hoc cleanup across systems.
Existing mechanisms can contribute to this design. NIST’s August 2026 guidance names SPIFFE and OAuth 2.0 as mechanisms enterprises can draw on for agent identification and authorization. It also names Workload Identity in Multi-System Environments (WIMSE) and Identity Assertion JWT Authorization Grant as emerging standards work—not as a settled, complete agent identity standard. NIST Cybersecurity Insights
What should agent activity logs establish?
Logs should let an organization connect an action to the agent identity that performed it and the sponsor responsible for that agent. They should also make it possible to review what the agent accessed or changed, when it acted, and under which authorization. Without that attribution, incident responders may see activity but struggle to distinguish an agent’s intended work from misuse of its credentials.
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Auditability depends on the surrounding systems as well as the agent. Check whether the relevant applications and APIs preserve the agent’s identity in their records, and whether investigators can trace that identity back to its owner and delegated rights. Logging only the human account whose credential was shared does not provide reliable agent-level attribution.
What does agent identity governance need to cover?
Identity controls are not a one-time setup. A workable governance process needs to account for agents as they are discovered, assigned owners, granted access, changed, and removed.
- Discover and inventory agents. Find agents operating in managed platforms and local deployments, including those that may not have been registered through a central process.
- Record ownership and purpose. Associate each agent with a sponsor, intended task, operating environment, and accountable team.
- Issue distinct identities and credentials. Ensure each agent can be identified by the systems it uses, without relying on a shared human account.
- Review delegated authorization. Check that granted rights remain appropriate as an agent’s task or access changes.
- Revoke access during incidents and retirement. Include agent identities and their credentials in exposure response and offboarding procedures.
- Verify attribution and auditability. Confirm that actions can be traced from system logs to the agent and its sponsor.
Local agent deployments that inherit user entitlements can make centralized identity management harder. NIST discusses hardened harnesses and controlled sandboxes as possible containment approaches; they can help limit an agent’s operating environment but do not replace identity and authorization controls. NIST Cybersecurity Insights
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Two Cloud Security Alliance studies point to governance and confidence gaps, but they are separate surveys with different sponsors and should not be combined into one estimate. The figures below describe respondents to those studies, not all organizations.
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| Study | Reported findings |
|---|---|
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Cloud Security Alliance and Oasis Security survey, conducted online in August–September 2025; 383 IT and security professional responses; reported January 2026. CSA survey release |
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Cloud Security Alliance’s Securing Autonomous AI Agents, released February 4, 2026 and commissioned by Strata Identity. CSA report |
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Read together, the studies suggest that agent deployment can outpace the ability to inventory identities and manage their lifecycle. They do not establish a vendor ranking or show that one product or protocol resolves the gaps.
What is NIST developing, and what can teams do now?
NIST’s National Cybersecurity Center of Excellence (NCCoE) is developing practical, implementation-oriented resources and an SP 1800-series practice guide. NIST says the guide is intended to include example implementations, architectures, build details, and lessons from NCCoE laboratory work using commercially available technologies. Its announced first implementation context is agent identity and authorization within the software development lifecycle, in collaboration with NIST’s DevSecOps project. NIST reported receiving feedback from more than 600 commenters on its concept paper; additional use cases remain to be scoped. NIST NCCoE project resource hub · NIST project update, September 29, 2026
That work is ongoing, so the first announced software-development use case is not a final general-purpose deployment prescription. Teams can assess their own readiness without waiting for it:
- Can you identify every agent in use, including local deployments, and name its sponsor?
- Does each agent have a distinct identity and credentials, or does it use a human or shared service account?
- Can you explain which rights were delegated, why they are needed, and how they will be reviewed?
- Can you rotate or revoke an exposed agent credential and trace actions to the agent and sponsor?
- Do approval prompts focus on consequential actions, with enough context for a human to make a real decision?
These questions also form a practical basis for evaluating identity tools: examine discovery and inventory, sponsor binding, credential lifecycle, delegated authorization, logging and attribution, fit with existing IAM and workload identity environments, and operational usability. The cited studies and NIST materials do not validate a comparative vendor ranking.
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