@article{spectralguardrailsforagentsinthewilddete, title = {Spectral Guardrails for Agents in the Wild: Detecting Tool Use Hallucinations via Attention Topology}, author = {Valentin Noël}, year = {2026}, eprint = {2602.08082}, archivePrefix = {arXiv}, url = {https://arxiv.org/abs/2602.08082}, }