update schema and added 404 response

openapi.yaml

@@ -247,16 +247,21 @@ paths:
           content:
             application/json:
               schema:
-                type: object
-                properties:
-                  message:
-                    type: string
+                oneOf:
+                  - $ref: '#/components/schemas/HelpListResponse'
+                  - $ref: '#/components/schemas/HelpCommandResponse'
         "400":
-          description: Failed to get help. The given AsyncAPI command is not valid.
+          description: Bad request
           content:
             application/json:
               schema:
-                $ref: "#/components/schemas/Problem"
+                $ref: '#/components/schemas/Problem'
+        "404":
+          description: Command not found
+          content:
+            application/problem+json:
+              schema:
+                $ref: '#/components/schemas/Problem'
         default:
           description: Unexpected problem.
           content:
@@ -453,6 +458,25 @@ components:
           type: [object, string]
           description: The diff between the two AsyncAPI documents.
 
+    HelpListResponse:
+      type: object
+      properties:
+        commands:
+          type: array
+          items:
+            type: string
+          description: A list of all available commands.        
+    HelpCommandResponse:
+      type: object
+      description: Detailed help information for a specific command.
+      properties:
+        command:
+          type: string
+          description: The name of the command.
+        description:
+          type: string
+          description: Detailed description of the command.
+
     Problem:
       type: object
       properties: