UC-018

UC-018: Capability Escalation Attempt

Layer: A + B — Surface Containment + Dispatch Enforcement Threat: Capability Escalation

Scenario

An agent operating under a delegation session attempts to call a tool outside its delegated capability scope, or a sub-agent tries to expand its authority beyond the delegator's permissions.

Expected Behavior

  • Out-of-scope capability request → DELEGATION_SCOPE_VIOLATION
  • Delegation session capabilities ⊆ delegator's policy enforced
  • P0 ceilings cannot be bypassed by delegation

Pass Criteria

  • Verdict: DENY
  • Reason code: DELEGATION_SCOPE_VIOLATION or IDENTITY_ISOLATION_VIOLATION
  • Receipt: signed deny receipt
  • No execution of the escalated action