Access
Access
What can this system reach?
Access is the reachability question, and it is almost always answered by accident. An agent gets a service account because that was the fastest path through the ticket queue, and inherits entitlements no human on the team holds. Nobody granted that. Nobody revoked it either.
Scoping Access means naming every system, dataset, tool and credential the agent can touch — including the ones it reaches transitively, through a tool that calls another tool. Reachability is not what the design document says. It is what the runtime permits.
Controls
Entitlement scoping per agent identity, a governed tool registry, data classification enforced at the boundary rather than in the prompt.
Failure mode
Privilege inheritance. The agent can read a table nobody remembers connecting, and the exposure only surfaces in the breach review.
Evidence
A reachability map, generated from the runtime and diffed on every release.