While MCP focuses on creating access to tools, A2A focuses on interoperability between agents.

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Enterprise deployment of agentic AI systems using Model Context Protocol (MCP) and Agent2Agent (A2A) frameworks presents significant security challenges. Key vulnerabilities include cross-server data leakage, inadequate authentication mechanisms, and prompt injection attacks. MCP focuses on tool access while A2A emphasizes agent interoperability. The article recommends using agent architectures as intermediaries to control data exposure, implementing proper authentication layers with existing enterprise identity systems, and employing detection strategies to mitigate prompt injections. A2A provides better security abstractions by acting as a trusted delegate that hides direct MCP server access.

Deploying A Secure Enterprise Agentic AI: MCP + Agent2Agent