Bedrock Agentcore > Structures > HarnessMetadataEvent HarnessMetadataEvent¶ Structure Class¶ HarnessMetadataEvent dataclass ¶ Token usage and latency metrics for the invocation. Attributes¶ metrics instance-attribute ¶ metrics: HarnessStreamMetrics Latency metrics. usage instance-attribute ¶ usage: HarnessTokenUsage Token usage counts.