OWASP turns excessive agency into an identity-design test

Model the agent as a workload identity

A production agent is not merely a chat window with better answers. Once it can read systems, call tools, create records, send messages, alter configurations, or trigger transactions, it behaves like a workload identity operating across an enterprise boundary. The CIO should require an inventory that connects each agent to its owner, purpose, approved tools, data domains, credentials, environments, and prohibited actions. This makes excessive agency visible before a prompt injection, ambiguous instruction, or software defect turns a plausible response into an unauthorized enterprise action.

Separate functionality from permission

A connector may expose dozens of operations even when one workflow needs only two. Giving the agent the full connector and relying on instructions to avoid the rest collapses application design into prompt discipline. Reduce the functions presented to the model, then give the execution identity only the data and actions required for the approved task. Separate read, draft, approve, and execute capabilities; scope credentials to a tenant and environment; and keep sensitive administration outside the agent path. A narrow tool surface also makes evaluation and incident analysis more tractable because the possible action set is bounded.

Place autonomy behind consequence thresholds

Not every correctable action needs the same approval. Retrieval or a reversible draft may run automatically, while external communication, financial commitment, production change, personnel decision, or destructive operation may require a named human checkpoint. Define those thresholds in policy and enforce them in the application, not solely in natural-language instructions. The approval screen should show the proposed action, target, material inputs, and expected effect so the reviewer can make a real decision. Rate limits, transaction ceilings, time windows, and two-person controls can further contain impact when an agent behaves outside expectation.

Test the path from instruction to effect

Traditional access review asks who has a permission. Agent review must also ask how untrusted content, retrieved material, tool output, or a user's phrasing could influence use of that permission. Exercise indirect prompt injection, confused-deputy scenarios, cross-tenant references, stale approvals, tool errors, retry loops, and attempts to invoke hidden operations. Log the instruction, policy decision, tool call, target, response, approval, and resulting state in a form operations teams can reconstruct. Passing an OWASP-inspired test is evidence about tested conditions; it is not a security certificate or a substitute for threat modeling the deployed architecture.

Turn this source into a reviewable decision

For AI for CIOs, use this briefing as a dated decision record rather than a substitute for the source. Preserve OWASP GenAI Security Project, the exact URL, the July 26, 2026 review date, the supported facts above, the editorial interpretation, the limitations, and any buyer-specific evidence. Link that record to the decisions most directly affected: Identity and agent access; Service management and employee support; Operations and incident intelligence; Enterprise AI platform architecture. State whether the source changes the scope, evidence requirement, control, sequence, or only the language used to describe the decision.

Before action, name the accountable owner, affected population and workflow, exact offering or configuration, source data and rights, human decision point, exception and appeal path, complete cost, expected benefit, failure and stop conditions, retained evidence, and next review date. Keep official facts, provider statements, buyer observations, representative tests, measured outcomes, editorial inferences, and unknowns visibly separate. Reopen the record when the source, offer, model, integration, data, policy, population, responsible person, or measured result changes.

Limitations and unknowns

The OWASP Top 10 is community-maintained security guidance and a risk vocabulary, not a compliance regime, product endorsement, or certification. The right identity, approval, logging, and testing controls depend on the actual architecture, data, actions, threat model, and applicable obligations.