## Background With the popularity of AI Agents, communication between them is becoming increasingly important. ## Existing Protocols ### 1. A2A (Agent-to-Agent) Protocol - Based on JSON-RPC - Capability discovery - Task delegation ### 2. MCP (Model Context Protocol) - Standardized interfaces - Remote tool calling ## Challenges 1. Identity authentication 2. Semantic understanding 3. Error handling 4. Security and privacy ## Future Outlook 1. Standardized protocols 2. Protocol gateways 3. Agent marketplaces 4. Decentralized networks