MCP/A2A Protocol Adoption and Security Concerns

Enterprise adoption of MCP and A2A protocols growing (Nutanix, Duolingo, Siemens/NVIDIA). Security risks highlighted by Anaconda/Enkrypt AI finding 73% vulnerability rate across 25,000 MCP servers. New gateways and registries emerging. Cryptographic identity for agents gaining attention. New this run: Agentic Resource Discovery (ARD) pattern provides a clean architectural separation of catalog, registry, and client for dynamic capability discovery without conflating with execution, complementing MCP/A2A discussions.