How to Test Multi-Agent Interoperability Safely
A safe multi-agent interoperability test begins with one low-risk, repeatable task. Give every agent a separate identity and read-only permissions, pin A2A, MCP, API, or adapter versions, and log discovery, authorization, task handoffs, and tool calls. Do not begin with production writes or external messages. Any payment, deletion, account change, write operation, or outbound communication should require explicit human approval. Then test timeouts, revoked credentials, expired identities, unavailable endpoints, and rollback. Measure incorrect calls, missed calls, latency, human review time, and recovery success. Expand only after the team can explain who acted, under which permission, with what evidence, and how the action was reversed.

