PropUQ-MAS: Propagation-Aware Uncertainty Quantification for LLM Multi-Agent Systems
LLM-based multi-agent systems (MAS) solve complex tasks through communication among role-specialized agents. However, inter-agent dependencies introduce reliability risks beyond isolated agent failures. For instance, errors in intermediate messages could be inherited and amplified by downstream agents. Existing uncertainty quantification (UQ) methods mainly target isolated responses or single-agent reasoning, and therefore fail to capture uncertainty propagation in MAS. To this end, we propose PropUQ-MAS, an error propagation-aware UQ framework that represents MAS execution as a communication-structured graph and estimates each step's reliability by combining local uncertainty with uncert...
| Authors | Yaokun Liu, Yifan Liu, Daniel Yue Zhang et al. |
|---|---|
| Primary category | cs.MA |
| Published | 22 August 2026 |
| Last updated at source | 1 September 2026 |
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