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Pause the agent’s ability to act, determine exactly which tools and identities it can use, and remove every permission the task does not require. If a credential may have been exposed or misused, revoke it and issue a replacement only after the scope is corrected. Re-enable the agent with a dedicated identity, short-lived task credentials, backend-enforced policy checks, and human approval for sensitive or irreversible actions.
Why excessive permissions are dangerous
An AI agent can be over-privileged in more than one way. It may have too many tools, a connector may expose a broad downstream identity, or the agent may be allowed to act autonomously for too long. OWASP describes these as excessive functionality, excessive permissions, and excessive autonomy.
A task that sounds read-only is not automatically safe. For example, an agent asked to inspect documents may use a connector whose service account can edit or delete them. An agent limited to a ticketing tool may still be able to change account roles if that tool maps to an administrator identity. The risk comes from the complete chain: model, tool, connector, credential, resource, and approval policy.
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Prompt wording is not an authorization boundary. Instructions such as “never delete anything” can be ignored, misunderstood, or bypassed when a tool and its identity permit deletion. The control must exist in the tool or backend that executes the request.
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What to do first: contain the agent
Start with containment rather than investigation through the same over-privileged connection. Stop the affected run, disable the relevant tool connection, or suspend the agent’s ability to make external changes. The exact control may be called pause, disable, quarantine, revoke session, or deactivate, depending on the platform.
- Stop active execution. Cancel queued jobs and terminate running sessions where the platform supports it.
- Disable the broad capability. Turn off the connector or tool that can write, delete, change permissions, send messages, or alter infrastructure.
- Preserve evidence. Export relevant tool-call, authentication, and backend audit logs before their normal expiry when feasible.
- Assess credential exposure. If a token, key, cookie, or service-account secret could have been revealed or misused, revoke it. Do not assume that pausing an agent invalidates tokens already issued or ends sessions elsewhere.
- Coordinate with system owners. Include the owners of identity, storage, messaging, cloud, code, and other connected systems in the assessment.
Containment is not proof that the incident is over. A disabled interface may leave other sessions, copied credentials, scheduled jobs, or alternate connectors active.
Scope the possible impact
Build an inventory for the affected agent, its initiating user or task, and the time period under review. Record what was configured, what was actually called, and what each call could have done.
| Inventory item | Questions to answer | Why it matters |
|---|---|---|
| Agent identity | Which service principal, workload identity, bot account, or API client made the call? | Shows which credentials and audit records to examine. |
| Initiating user and session | Who started the task, from which session, and under what delegated authority? | Authorization should be tied to a real user and task, not only to a reusable bot. |
| Tools and operations | Could the agent read, create, modify, delete, send, execute code, change permissions, or fetch arbitrary URLs? | Broad operations often create more risk than the business task requires. |
| Downstream identity | Which account does each connector use, and is it shared with people or other automation? | A narrow-looking tool can inherit a powerful account. |
| Resources | Which tenants, projects, repositories, folders, records, networks, or environments were reachable? | Resource boundaries determine the blast radius. |
| Credential details | What token type, scopes, audience, issue time, expiry, and rotation history apply? | Determines whether revocation is necessary and how long access could persist. |
| Recent activity | Which calls occurred, what parameters were supplied, and what responses or side effects followed? | Separates theoretical access from actions that may have changed data or systems. |
Look specifically for write or delete operations, permission-management calls, external communications, code or command execution, infrastructure changes, and attempts to bypass approval. Correlate agent logs with the downstream system’s own audit trail because the agent’s log may omit failed calls, retries, or actions made by a connector.
Reduce access at both layers
Least privilege has two separate targets: the functions exposed to the model and the permissions held by the identity behind those functions. Restricting only one layer leaves the other as an escape route.
Remove unnecessary tools and operations
Delete tools the task does not need. Prefer a purpose-built operation such as “list invoices for customer 123” over an open-ended shell, database console, arbitrary URL fetcher, or general file editor. Narrow operations reduce the number of ways a malformed request or hostile content can produce a side effect.
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For each remaining tool, define allowed verbs explicitly. A reporting agent may need list and read, but not create, update, delete, execute, invite, publish, or change-role operations. Treat URL fetching, code execution, email sending, and permission changes as high-risk capabilities even when they appear convenient.
Constrain resources and context
Limit access to the smallest tenant, project, repository, folder, record set, or environment needed for the task. Avoid a token that can read every production account when the job concerns one test project. Bind the call to the authorized user and task so that a credential copied into another workflow cannot silently become a general-purpose identity.
Separate read and write identities
Use a read-only identity for inspection and a separate, more restricted identity for changes. Do not grant write access to the read identity “just in case.” If a later step requires a change, make that a new operation with its own authorization and approval rather than silently upgrading the original session.
How to give an agent read-only access
Read-only access is a combination of tool design, backend authorization, and downstream identity settings. Apply all three.
- Define the task’s data boundary. Name the exact resources the agent may inspect, such as one project, repository, or folder.
- Expose read operations only. Remove create, update, delete, execute, send, share, and permission-management methods from the tool schema and routing layer.
- Create a dedicated read-only identity. Grant it provider-level read roles only for the required resources. Do not reuse a developer’s personal account or a broad administrator credential.
- Enforce the boundary in the backend. The service that performs the operation must check the identity, resource, operation, user, and task. A model-visible description is not sufficient.
- Test denied actions. Attempt representative write, delete, role-change, and cross-resource requests and confirm that the backend rejects them, records the denial, and causes no side effect.
- Verify the token. Check that its scopes, audience, resource restrictions, and expiry match the read-only design.
A tool that returns data can still create risk through sensitive content, prompt injection, or arbitrary network access. Restrict the data set and outbound destinations as well as the verb.
Use dedicated identities and short-lived credentials
Every agent should have a distinct identity that can be disabled without disrupting a human administrator or unrelated automation. Bind that identity to the initiating user and task when the platform supports delegation. This makes it possible to answer both “which agent acted?” and “on whose authorized task?”
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Prefer short-lived, task-scoped tokens over permanent keys. Set the narrowest resource and operation scopes, a specific audience, and an expiry that covers the task rather than an entire workday or project lifetime. Keep secrets out of prompts, conversation history, source repositories, and logs. Rotate or revoke credentials when exposure is plausible; do not merely create another credential while leaving the old one active.
Credential design should include a tested revocation path. Know where to disable the identity, invalidate active sessions, remove refresh tokens, and confirm that downstream systems no longer accept the credential. The exact commands and screens differ by platform, so document the provider-specific procedure for your environment.
Put approval gates around consequential actions
Require an explicit human approval before security-relevant changes, including permission grants, authentication-policy changes, secret rotation, account disabling, firewall or network changes, and production configuration updates. Use stronger review for irreversible or high-impact actions such as deletion, public release, financial transfer, mass messaging, or destructive infrastructure operations.
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For risky workflows, use a two-step design: the agent prepares a proposed change, then a separate controlled operation applies the approved change. Show the reviewer a human-readable diff or impact summary, and reject the request if the approved parameters do not match the execution request.
Log enough to investigate and review
Retain auditable records of tool calls and their outcomes. At minimum, capture the agent and user identities, session or task identifier, tool and operation name, target resource, relevant parameters, authorization decision, approval reference, timestamp, result, and error. Protect logs from alteration by the same identity being monitored.
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Log denials and failed attempts as well as successful calls. Redact secrets and unnecessary personal data, but do not remove the fields needed to reconstruct scope or impact. Correlate the agent record with downstream logs so that retries, asynchronous jobs, and connector-side actions remain visible.
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OWASP guidance supports access reviews and logging but does not prescribe one universal review interval or retention period. Set a cadence based on data sensitivity, operational change, and legal requirements; review sooner after a new connector, role change, incident, or unexplained denial.
Re-enable the agent safely
Restore capability only after the inventory and scope decision are complete. Use this release checklist:
- The broad or unused tools are removed.
- Read and write operations use separate identities where practical.
- Resource boundaries are explicit and tested.
- The token is short-lived, task-scoped, and revocable.
- Backend policy checks bind calls to the authorized user and task.
- Sensitive and irreversible actions pause for the required approval.
- Denied-action tests show no side effect.
- Tool-call and downstream audit logs are enabled and reviewable.
- Any exposed credential has been revoked, and replacement credentials were issued only after correction.
Start with the smallest useful capability and expand only when a documented task requires it. Monitor the first runs after re-enablement for unexpected tools, resources, parameters, retries, or approval failures.
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Problem: The agent is told not to write, but the connector still has write access.
Correction: Remove the write operation and enforce the denial in the backend identity policy.
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Pausing the chat but not revoking tokens
Problem: Existing sessions, refresh tokens, or scheduled jobs continue to work.
Correction: Inspect the provider’s session and token controls, revoke exposed credentials, and verify rejection from the downstream service.
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Using a developer’s administrator account
Problem: The agent inherits unrelated privileges and its activity is difficult to distinguish from the developer’s.
Correction: Create a dedicated agent identity with task-specific scopes and separate audit ownership.
Granting a broad tool for convenience
Problem: A shell, unrestricted database, or arbitrary HTTP tool can reach functions never considered in the original task.
Correction: Replace it with narrow operations and restrict destinations, resources, and methods.
Approving an entire session
Problem: One approval silently authorizes later, different actions.
Correction: Require approval for the specific sensitive operation and verify that execution parameters match what was approved.
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Problem: Connector retries, asynchronous work, or downstream changes are missing.
Correction: Correlate agent records with identity, storage, cloud, code, messaging, and other affected-system audit logs.
Choosing between control designs
| Control choice | Prefer when | Trade-off to check |
|---|---|---|
| Purpose-built operation | The task is predictable and can be expressed as a small set of actions. | Less flexible; new tasks require a reviewed operation. |
| General-purpose tool with policy wrapper | Several related actions are necessary and a trusted backend can enforce constraints. | Policy complexity and testing burden are higher. |
| Separate read and write identities | Inspection is frequent but changes are occasional or high impact. | More identity and workflow management. |
| Per-action approval | An action affects security, production, external parties, or irreversible data. | Slower execution and reviewer availability requirements. |
| Short-lived task token | Sessions are bounded and revocation must be fast. | Requires reliable token issuance and renewal handling. |
Evaluate each design by scope granularity, duration and revocability, backend enforcement, separation of read and write, approval strength, and audit detail. The most convenient control is not necessarily the safest if it leaves a broad identity or an unreviewed escape path.
What to document for future reviews
Keep a current record of every agent’s purpose, owner, identity, connected tools, operations, resource boundaries, token lifetime, approval rules, and logging destination. Record why each permission exists and what test demonstrates that an unneeded operation is denied. Revisit the record after connector changes, role changes, new data sources, or incidents. There is no single review schedule suitable for every organization; the cadence should reflect the sensitivity and rate of change of the environment.
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