usage: hirearchy obs metrics [-h] [--since SINCE] [--by {agent,tool,service,trace}] [--agent ADDR]
                             [--limit LIMIT] [--json]

options:
  -h, --help            show this help message and exit
  --since SINCE         15m, 24h, 7d or an ISO timestamp (default 24h)
  --by {agent,tool,service,trace}
                        also group by this
  --agent ADDR          only this agent
  --limit LIMIT         rows shown per table
  --json
