diff --git a/homeassistant/components/onkyo/quality_scale.yaml b/homeassistant/components/onkyo/quality_scale.yaml
index 46f0f6d3b0d..cdcf88e72d7 100644
--- a/homeassistant/components/onkyo/quality_scale.yaml
+++ b/homeassistant/components/onkyo/quality_scale.yaml
@@ -7,10 +7,7 @@ rules:
       This integration uses a push API. No polling required.
   brands: done
   common-modules: done
-  config-flow:
-    status: todo
-    comment: |
-      The data_descriptions are missing.
+  config-flow: done
   config-flow-test-coverage:
     status: todo
     comment: |
diff --git a/homeassistant/components/onkyo/strings.json b/homeassistant/components/onkyo/strings.json
index 1b0eadcc45e..95ca1199a36 100644
--- a/homeassistant/components/onkyo/strings.json
+++ b/homeassistant/components/onkyo/strings.json
@@ -10,18 +10,28 @@
       "manual": {
         "data": {
           "host": "[%key:common::config_flow::data::host%]"
+        },
+        "data_description": {
+          "host": "Hostname or IP address of the receiver."
         }
       },
       "eiscp_discovery": {
         "data": {
           "device": "[%key:common::config_flow::data::device%]"
+        },
+        "data_description": {
+          "device": "Select the receiver to configure."
         }
       },
       "configure_receiver": {
         "description": "Configure {name}",
         "data": {
-          "volume_resolution": "Number of steps it takes for the receiver to go from the lowest to the highest possible volume",
-          "input_sources": "List of input sources supported by the receiver"
+          "volume_resolution": "Volume resolution",
+          "input_sources": "Input sources"
+        },
+        "data_description": {
+          "volume_resolution": "Number of steps it takes for the receiver to go from the lowest to the highest possible volume.",
+          "input_sources": "List of input sources supported by the receiver."
         }
       }
     },
@@ -43,6 +53,9 @@
       "init": {
         "data": {
           "max_volume": "Maximum volume limit (%)"
+        },
+        "data_description": {
+          "max_volume": "Maximum volume limit as a percentage. This will associate Home Assistant's maximum volume to this value on the receiver, i.e., if you set this to 50%, then setting the volume to 100% in Home Assistant will cause the volume on the receiver to be set to 50% of its maximum value."
         }
       }
     }