arXiv 2510.21057, now trending on HuggingFace, introduces SIC — a modular pre-processing filter that iteratively inspects tool inputs for adversarial instructions, rewrites or masks them, and halts the agent if violations persist after the iteration limit. The method operates as a multi-layered sanitization pipeline before tool-augmented LLM execution, complementing architectural defenses like zero-trust authorization and sandboxing. Drop-in runtime defense for any agent stack where untrusted data enters via tool results or web content.