json_schema: {
      "additionalProperties": false,
      "description": "MachineBoss parameter constraints schema",
      "properties": {
          "norm": {
              "items": {
                  "items": {
                      "minItems": 1,
                      "type": "string"
                  },
                  "type": "array"
              },
              "type": "array"
          },
          "prob": {
              "items": {
                  "type": "string"
              },
              "type": "array"
          },
          "rate": {
              "items": {
                  "type": "string"
              },
              "type": "array"
          }
      },
      "type": "object"
  }