What Is an Agent Registry? Tracking Autonomous Systems

Agents hold credentials, take actions, and spend money, which makes them subjects of identity governance rather than entries in a software catalogue. Conventional access management was built around people and their employment lifecycle, and nothing in it triggers a review of an automation that has been running since a project two years ago. This explainer covers the register that closes that gap. It complements what is an ai inventory and what is least privilege for ai agents, and reflects FISTA Solutions' approach in AI agents delivery.

Why a separate register?

Because agents raise authorisation questions that a system inventory does not. What credentials does it hold. What may it do without approval. What is the spending limit. Who authorised that authority and when was it last reviewed.

Those belong alongside identity governance rather than alongside system documentation, and keeping them in one place is what allows an access review to cover non-human identities at all.

Entry field	Purpose
Identity and credentials	Traceability of actions
Systems accessed	Blast radius
Permitted actions	Authorisation boundary
Spending and volume limits	Financial control
Approval requirements	Human gates
Named owner	Accountability
Review date	Forces lifecycle decisions

Why do agent identities escape governance?

Because access governance is built around employment. Someone joins, is provisioned; changes role, is re-provisioned; leaves, is deprovisioned. Every review is triggered by an HR event.

An agent is created by an engineer, granted permissions for a purpose, and then nothing ever triggers a review. It persists through reorganisations, project closures, and the departure of everyone who knew what it was for. Non-human identities now outnumber human ones in many estates, and they are the population with the least oversight.

Why a named individual owner?

Because team ownership is nobody's ownership when a decision is required. An agent behaving unexpectedly needs a person who can decide whether it keeps running, and a distribution list cannot make that call.

Owners should be re-confirmed periodically, because people move. An agent whose owner left the organisation is exactly the agent that needs attention.

What authority limits belong here?

Everything that bounds what the agent can do: which operations, on which records, up to what value, with what volume, and which actions require human approval.

Recording them in the registry is necessary and not sufficient — they must also be enforced in the tool implementations, checked against the agent's identity at the point of action. The registry is the statement; the enforcement is the control. See what is a guardrail policy.

Why is decommissioning the weak point?

Because nothing prompts it. A project ends, the agent that supported it keeps its credentials and, if it is scheduled, keeps running. Nobody notices until an audit or an incident.

Every entry carrying a review date forces the question periodically: is this still needed, is the owner still here, are the permissions still appropriate. That single field does most of the work.

What should entries link to?

Its evaluation evidence, its operational traces, and its incident history. An agent registry that links to what the agent actually did is far more useful during an investigation than one that records only what it was permitted to do.

What should you do first?

Count the non-human identities in your environment that can take actions, and check how many have a named owner and a review date. The answer is usually uncomfortable and it is the clearest possible case for building the register.

How does this support incident response?

Decisively. When an agent does something unexpected, the first questions are what it was permitted to do, who owns it, and how to stop it. A registry answers all three in seconds; without one the first half hour of an incident goes on establishing what the thing even is.

Entries should therefore include the operational detail responders need: how to disable it, what depends on it, and what happens to in-flight work if it stops. That information is obvious to whoever built it and unavailable to anyone else at 3am.

What about agents built by non-engineers?

They are the growing category and the one most likely to be missing from any register. Low-code platforms and assistant builders let business users create automations with real permissions, and those users have no reason to think of what they built as an agent requiring registration.

Capturing them means putting registration into the platforms themselves rather than relying on a policy, which is the same lesson the inventory teaches about discovery: the register is populated by the path people already use, or it is populated by nobody.

How does it relate to the AI inventory?

The inventory records systems; the registry records actors. An agent appears in both — as a system with a purpose and as an identity with permissions — and keeping the two views linked means a governance question about what an agent may do can be answered alongside what it is for.

How FISTA Solutions helps

FISTA Solutions maintains agent registries with identity, permissions, authority limits, named individual owners, and forced review dates, enforces the recorded limits in tool implementations rather than only documenting them, and links entries to evaluation evidence and operational traces, through AI agents, AI enablement, and forward deployed engineers. The record behind the approach is 150+ projects for 50+ companies with 99.9% uptime.

To govern the agents you are already running, message FISTA on WhatsApp, or read what is an ai inventory.