HARP: Measuring Harm Amplification in Multi-Agent LLM Systems
Multi-agent LLM systems decompose workflows across agents, tools, shared context, memory, and decision gates. This modularity improves interpretability, but creates a propagation risk: a bounded perturbation to one component can be reused by other agents and amplified into system-level harm. We introduce HARP (Harm Amplification through Role Perturbation), a trace-first methodology for studying local-to-global harm amplification in multi-agent LLM systems. HARP compares paired clean and perturbed executions and records specialist outputs, tool calls, memory reads/writes, guard events, oracle logs, latency, token cost, and decisions. We define local harm as deviation from targeted agents o...
| Authors | Md Hafizur Rahman, Zafaryab Haider, Tanzim Mahfuz et al. |
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| Primary category | cs.CR |
| Published | 26 May 2026 |
| Last updated at source | 26 May 2026 |
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