The event types
What events are for
- Proof of connection. A stored key or a completed setup screen proves configuration only. An agent is proven when it has registered, a heartbeat has arrived, a real tool call has been recorded, and a complete turn has appeared. An MCP server runs no agent loop, so its bar is registration, heartbeat, and a tool call — no turn.
- Understanding behavior. Expand a turn to see what the agent saw and which tools it called before you decide what to write rules about.
- Audit. Events, decisions, and receipts together reconstruct what happened and why.