diff --git a/admin-openapi.json b/admin-openapi.json
index 3336b72881..932b8f7425 100644
--- a/admin-openapi.json
+++ b/admin-openapi.json
@@ -592,7 +592,8 @@
                   "type": "object",
                   "properties": {
                     "success": {
-                      "type": "boolean"
+                      "type": "boolean",
+                      "description": "Always `true` when the run is queued."
                     },
                     "runId": {
                       "type": "string",
@@ -608,7 +609,7 @@
             "content": {
               "application/json": {
                 "schema": {
-                  "$ref": "#/components/schemas/Error"
+                  "$ref": "#/components/schemas/AutomationWebhookError"
                 }
               }
             }
@@ -618,7 +619,7 @@
             "content": {
               "application/json": {
                 "schema": {
-                  "$ref": "#/components/schemas/Error"
+                  "$ref": "#/components/schemas/AutomationWebhookError"
                 }
               }
             }
@@ -628,7 +629,7 @@
             "content": {
               "application/json": {
                 "schema": {
-                  "$ref": "#/components/schemas/Error"
+                  "$ref": "#/components/schemas/AutomationWebhookError"
                 }
               }
             }
@@ -638,7 +639,17 @@
             "content": {
               "application/json": {
                 "schema": {
-                  "$ref": "#/components/schemas/Error"
+                  "$ref": "#/components/schemas/AutomationWebhookError"
+                }
+              }
+            }
+          },
+          "500": {
+            "description": "The automation run could not be queued because of an unexpected server error.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/AutomationWebhookError"
                 }
               }
             }
@@ -700,6 +711,19 @@
           }
         }
       },
+      "AutomationWebhookError": {
+        "type": "object",
+        "properties": {
+          "success": {
+            "type": "boolean",
+            "description": "Always `false` for error responses."
+          },
+          "error": {
+            "type": "string",
+            "description": "Error message."
+          }
+        }
+      },
       "Error": {
         "type": "object",
         "properties": {