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Allocative Harm in Multi-User Arbitration

mediumAgency & tools
Also known as: allocation harm, multi-tenant unfairness, priority-arbitration bias

Definition

When one AI agent serves many people at once, it has to decide whose request comes first or who gets a limited resource. If it does that unfairly — always favouring some users over others — it can quietly disadvantage whole groups, even without any single obvious error.

Where it attaches

The system components this risk arises at.

🎛️ Orchestrator / Agent Loop🗺️ Planner Agent🔐 Identity & Permissions📈 Monitoring & Evals

Detection signals

  • Aggregate outcome or latency disparities across user cohorts or tenants
  • A shared agent's prioritisation systematically favouring some users
  • Resource starvation for low-priority or protected groups
  • No per-cohort fairness monitoring on an agent serving many users

Controls & guardrails that address this

4

Grouped by control function, with the AI lifecycle stage(s) to apply each and the other risks it addresses. Filter by control category below.

Control category
Preventive · 1
Human-in-the-loop approval on high-risk actionsinteractive

Pausing to ask a person before doing anything big or hard to undo — sending money, deleting data, emailing customers.

Open these in the Control Library →

Framework mappings

OWASP LLM Top 10
MITRE ATLAS
NIST AI RMF
  • MEASURE 2.11
  • GOVERN 1.2

AI RiskAtlas is an educational model of how GenAI & agentic systems work and fail. Architectures and payloads are illustrative and simplified for learning — not operational guidance. Real-world cases are summarised from public reporting.

Sources & further reading →·Built by Shi Yuan ↗