Trustworthy Agent Network: Trust in Agent Networks Must Be Baked In, Not Bolted On
This vision paper identifies a new problem—trust in A2A networks—for the emerging field of multi-agent LLM systems, but offers no empirical results or concrete solutions.
The paper argues that trust in Agent-to-Agent (A2A) networks cannot be achieved by retrofitting existing individual-agent alignment techniques, but must be architected from the start. It proposes a conceptual framework with four design pillars for trustworthy A2A coordination.
The rapid advancement of Large Language Models has given rise to autonomous LLM-based agents capable of complex reasoning and execution. As these agents transition from isolated operation to collaborative ecosystems, we witness the emergence of the Agent-to-Agent (A2A) network, a paradigm where heterogeneous agents autonomously coordinate to solve multi-step tasks. While these networks may offer better task performance compared to simply using one agent to complete the entire task, they introduce systemic vulnerabilities, such as adversarial composition, semantic misalignment, and cascading operational failures, that existing agent alignment techniques cannot address. In this vision paper, we argue that the trustworthiness of A2A networks cannot be fully guaranteed via retrofitting on existing protocols that are largely designed for individual agents. Rather, it must be architected from the very beginning of the A2A coordination framework. We present a comprehensive conceptual framework that situates trust in A2A systems through four design pillars.