OpenTelemetry MCP Server

Instructions

Implementation Reference

• src/tools/prometheus_tools.py:143-175 (handler)

  The core implementation of the list_label_values tool handler in prometheus_tools.py.

  async def list_label_values(
      client: PrometheusClient,
      label: str,
      metric: Optional[str] = None
  ) -> Dict[str, Any]:
      """
      Get all values for a specific label.
      
      Args:
          client: Prometheus client
          label: Label name (e.g., 'service', 'job', 'namespace')
          metric: Optional metric to filter label values
          
      Returns:
          List of label values
      """
      try:
          match = [f"{{{metric}}}"] if metric else None
          result = await client.label_values(label, match)
          
          if result.get("status") == "success":
              values = result.get("data", [])
              return {
                  "success": True,
                  "label": label,
                  "count": len(values),
                  "values": values
              }
          else:
              return {
                  "success": False,
                  "error": "Failed to fetch label values"
              }