> Design, synthesize, produce, acquire, operate, test, deploy, or plan the deployment of biological, chemical, radiological, or nuclear weapons, explosive or improvised explosive devices, or their precursors or delivery mechanisms, including developing weapons-critical technology (such as fissile material production, enrichment, or device design)

https://www.anthropic.com/legal/aup

It doesn't deal with creating mustard gas questions reframed as curiosity queries, and that might impact legit curiosity queries like OPs, but isn't surprising. They've also disclosed ahead of time how conservative the guardrails are.