A wave of funding just landed on agent supervision, and the practical question for anyone running infrastructure is what the tooling does that existing monitoring and access control do not. Three capabilities are genuinely new. The rest is repositioning. Action chain tracing Traditional application monitoring records requests, latencies, errors, and traces across services. An agent produces a different shape of telemetry: a sequence of tool calls, each individually valid, chosen at runtime by a model whose reasoning is not in the log.