OpenTelemetry MCP Server

Instructions

Implementation Reference

• src/tools/loki_tools.py:128-172 (handler)

  The implementation of the `list_log_labels` tool handler which calls the Loki client to retrieve log labels.

  async def list_log_labels(
      client: LokiClient,
      start: Optional[str] = None,
      end: Optional[str] = None
  ) -> Dict[str, Any]:
      """
      List all log stream labels.
      
      Args:
          client: Loki client
          start: Start time for label discovery
          end: End time for label discovery
          
      Returns:
          List of label names
      """
      try:
          # Parse time range if provided
          start_ns = None
          end_ns = None
          if start or end:
              start_dt, end_dt = parse_time_range(start, end)
              start_ns = to_loki_time(start_dt)
              end_ns = to_loki_time(end_dt)
          
          result = await client.labels(start_ns, end_ns)
          
          if result.get("status") == "success":
              labels = result.get("data", [])
              return {
                  "success": True,
                  "count": len(labels),
                  "labels": labels
              }
          else:
              return {
                  "success": False,
                  "error": "Failed to fetch labels"
              }
      except Exception as e:
          logger.error(f"Error listing log labels: {e}")
          return {
              "success": False,
              "error": str(e)
          }