To review and revoke an autonomous AI agent’s access, inventory what it can reach, identify which identity or service issued each permission, remove grants at that layer, and test whether access has actually stopped. Disabling a tool in an agent’s settings alone may not revoke a separate OAuth grant, application permission, or downstream account authorization.
What can the agent access?
Start with the agent’s identity and owner, then map the capabilities it has in practice—not merely the tools displayed in its configuration. Microsoft recommends unique agent identities with named owners, documented purpose and approved data access, and reviews of aggregate effective permissions across roles, tools, and downstream systems.
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Build an inventory
- Identity and accountability: record the agent’s identity, accountable owner, approver, purpose, and deployment environment.
- Identity-provider access: list roles, resource scopes, group membership, access packages, and any guest or cross-tenant access.
- Application authorization: identify delegated OAuth scopes, app-only permissions, service principals, and connected user accounts.
- Agent controls: record enabled tools and actions, including whether each can read, write, or perform a high-impact operation.
- Credentials and execution: note which credentials or tokens the agent uses, who controls their lifecycle, and whether runs or sub-agents can retain access.
- Downstream systems: list the data stores, APIs, and other services the agent can reach, including systems that enforce their own authorization.
For each entry, record the resource and data scope, permitted actions, approving owner, and whether the agent still needs the access for its assigned task. Deny unreviewed tools and integrations by default; remove unused permissions and narrow broad grants to the smallest practical resource and action scope.
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Which authorization layer holds the grant?
An agent may have several independent controls. Trace each capability to the system that grants or enforces it before attempting revocation.
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| Layer | What to inspect | What changing it does—and does not do |
|---|---|---|
| Agent or tool policy | Enabled tools, available actions, read/write settings, and approval gates. | Can prevent the agent from invoking an action through that interface; does not necessarily remove the identity provider’s OAuth grant or the service’s own authorization. |
| Identity provider | Delegated grants, app-only permissions, role assignments, group membership, and access packages. | Removing a grant changes the authorization held at that provider; check other principals and assignments that may still provide access. |
| Connected service or account | Provider-side authorization, linked user accounts, credentials, and service-specific access rules. | Disconnecting or unlinking can stop future access through that connection. A separate provider control may be needed, and downstream rules still matter. |
| Downstream resource | Resource-specific roles, scopes, policies, and authorization checks. | Enforcement occurs at the resource. Verify that the resource denies the agent’s request rather than assuming an upstream setting has taken effect. |
Delegated access versus app-only access
Microsoft Entra distinguishes delegated permissions, which let an application act on behalf of a signed-in user, from application permissions, which give an application app-only access. In Microsoft 365 examples, delegated scopes appear in a token’s scp claim, while application permissions appear in its roles claim. The claim is a way to understand the authorization represented in a token; inspect the grant and assignments in Entra as well.
Microsoft describes delegated permissions as suitable for interactive agents acting on behalf of a signed-in user, and application permissions as an option for autonomous agents needing app-only access. Choose the authorization model that matches the task, then keep its resource and action scope as narrow as practical. These are Microsoft examples, not universal controls or token formats for every platform.
How do I revoke access?
Remove each grant where it is issued or stored. Exact menus and controls vary by product, workspace, and app, so treat the following as product-specific examples and check current official documentation before making changes.
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- In the Microsoft Entra admin center, open Enterprise apps > All applications, select the application, and open its Permissions view. Use this as a review entry point for the permissions granted to that application.
- Inspect both delegated permission grants and application role assignments. Also check relevant user and group assignments; removing one grant does not rule out a separate route to the same resource.
- Remove the relevant OAuth permission grant or app role assignment using the Entra portal, Microsoft Graph, or PowerShell, following Microsoft’s current guidance for the specific object and required administrative access.
- Review the application permission activity log for the change. Microsoft identifies events including “Add app role assignment to the service principal” and “Remove app role assignment from the service principal.”
Microsoft documents these methods in Review permissions granted to enterprise applications and its guidance on viewing application permission activity logs. The correct grant to remove depends on how the application obtained access.
ChatGPT connected apps: disconnect the account
Open ChatGPT Settings, then Apps or Plugins, select the app and connected account, and use the disconnect control. OpenAI documents disconnecting the connected account as the step to stop future access through that account; the provider may also have a separate unlink control.
Changing an app permission or action-approval setting is not the same as disconnecting the provider account. App permissions govern whether ChatGPT asks before using an available action; they do not themselves grant source-system access or override workspace policies. In a managed workspace, review role access, app enablement, action availability, approval settings, and provider authorization separately. OpenAI notes that provider approval does not automatically enable a new action, and changing a future-action setting does not remove existing provider consent.
See OpenAI’s instructions for managing app permissions in ChatGPT and its guidance on admin controls, security, and compliance for plugins and apps. The documented menu names and available controls can vary across product surfaces and workspaces.
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How do I contain an urgent risk and confirm revocation worked?
For a suspected compromise or other urgent concern, contain the agent and remove the relevant grants, then validate the effect in the actual deployment. Microsoft recommends testing revocation paths that include disabling the agent, rotating credentials, invalidating tokens, removing stale permissions, and checking downstream enforcement.
- Pause the agent or disable its execution if the platform supports it; cancel active runs where possible.
- Remove the grant at its issuing layer and check for alternate principals, group assignments, connected accounts, or credentials that may still provide the same access.
- Rotate or invalidate credentials when appropriate, especially if a credential may have been exposed. Consider cached credentials and any systems that hold copies.
- Inspect audit records for the permission change and note the relevant application or identity, event, and time.
- Test a representative request through the agent and, where useful, directly against the downstream resource. Confirm that a new tool invocation or resource request is denied.
- Record the observed outcome, including what was tested and whether any path still succeeded. Do not report access as stopped until the relevant behavior has been verified.
Revocation may not take effect instantly everywhere. Microsoft’s emergency guidance warns that access tokens can remain valid for their lifetime in some cases; token behavior and propagation depend on the provider and configuration. Removing a grant, changing a tool toggle, and invalidating an already-issued token are different operations, so verify the result rather than assuming one guarantees the others.
What should the review record contain?
Keep a concise record that lets another administrator understand what was reviewed and what changed:
- Agent identity, owner, reviewer, review date, purpose, and deployment environment.
- Resources, data scopes, principals, tools, and permission types inspected.
- Grants removed or narrowed, the system where each change was made, and the related audit evidence.
- Validation performed, its result, and any access that remained or could not be tested.
Repeat the review when the agent’s purpose, tools, data scope, or deployment environment changes. Microsoft’s least-privilege guidance for AI agents with Microsoft Entra Agent ID recommends reviewing effective access across roles, tools, and downstream systems, and testing revocation paths.
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