Agent-to-Agent Systems

Join us at AGNTCon + MCPCon NA 2026, the premier event for people building, operating, researching, or supporting agent systems. Where developers, architects, and AI practitioners come together to explore the latest in agentic AI, tool protocols, and production-ready MCP architectures. Learn more here: https://events.linuxfoundation.org/agntcon-mcpcon-north-america/ Designing Trust Boundaries for Agent-to-Agent Systems: Lessons Learned from a Technical PoC - Ryuji Iijima, Softbank Corp. As AI agents increasingly invoke tools, access enterprise data, and collaborate, a new architectural challenge emerges: Where should trust boundaries be defined, and where should governance and security controls be enforced? To explore this, we conducted a technical PoC introducing a shared control layer across agent-to-agent communications and tool execution pathways. Rather than presenting an ideal architecture, this session focuses on practical challenges and lessons learned during implementation. Key topics include: - Defining the "Agent": How to define what constitutes an agent in an ecosystem and where to establish trust boundaries for validation, monitoring, and control - Architectural Insights: Redesign considerations and insights that emerged through prototype development and PoC activities. - Performance Trade-offs: Balancing stronger security and governance with the low-latency requirements needed for real-world deployment. We will share practical takeaways on designing trust boundaries and navigating trade-offs among security, governance, and operational performance.