Querying OpenTelemetry metrics datasets in Honeycomb, whose rules differ from trace/event datasets: bare COUNT, RATE_SUM, RATE_AVG, RATE_MAX and CONCURRENCY are forbidden, temporal aggregation is automatic, and each metric has its own attributes. Use for gauges, counters, histograms and sums; temporal aggregation (RATE, INCREASE, SUMMARIZE, LAST); finding the metrics dataset, metric names and attributes; unexpected metrics results; infrastructure metrics (CPU, memory, disk I/O, network). Not for instrumenting metrics (use otel-instrumentation), event datasets with "metrics" in their name, or conceptual questions (use observability-fundamentals).