The text discusses the need for a common language in AI systems to enable reliable and scalable multi-agent interaction. As AI clients move from data consumers to active intermediaries, they require structured communication beyond secure APIs or natural language. Natural language is too ambiguous for agent interaction, and it's not sufficient to ensure coordination and shared structure among models. Instead, infrastructure that is auditable, structured, and designed for machine coordination is necessary. The authors propose using defined schemas, roles, and formats to improve model-to-model communication and suggest the development of protocols like Anthropic's Model Context Protocol (MCP) as a solution. These protocols aim to provide a standardized interface between AI agents and APIs, enabling machines to communicate effectively and safely. The text also highlights the importance of structure in making intelligence scalable, and it emphasizes that models need frameworks to manage complexity and ensure predictability.