Hardens MCP servers against MCP-specific attacks - tool poisoning, rug pulls, prompt injection via tool results, session hijacking, SSRF, command injection - with guardrails-in-code, sandboxing, audit logging, kill switches. Use for securing, hardening, threat-modeling, or security-reviewing an MCP server or vetting a third-party one. Not for OAuth/token wiring or generic appsec scans.