update docstring

Author: aviat cohen

src/fabric_cli/commands/fs/mkdir/fab_fs_mkdir_item.py

@@ -16,20 +16,33 @@
 
 
 def exec(item: Item, args: Namespace) -> str | None:
-    """Execute the creation of a Microsoft Fabric item.
-    
-    Handles two scenarios based on is_root_operation:
-    - **Root operation** (is_root_operation = True): User-initiated standalone creation.
-      Shows individual output, handles dependencies, and cleans up batch collection.
-    - **Batch operation** (is_root_operation = False): Part of dependency creation chain.
-      Operates silently, collects results for consolidated output by root operation.
-    
+    """
+    Execute the creation of a Microsoft Fabric item.
+
+    This method supports items that may require creating additional dependent
+    artifacts (e.g., a Report that implicitly creates a SemanticModel).  
+    Output behavior differs depending on whether the current call represents the
+    user‑requested creation or an internally triggered dependency.
+
+    Two execution modes:
+    - **Root operation** (`is_root_operation=True`):  
+    Represents the item explicitly requested by the user.  
+    Handles creation of the item and any required dependencies.  
+    Collects and returns a consolidated output for all created artifacts.
+
+    - **Dependency operation** (`is_root_operation=False`):  
+    Represents an item created implicitly as part of another item's dependency chain.  
+    Runs silently and contributes its result to the root operation’s batch output,  
+    without producing standalone output.
+
     Args:
-        item (Item): The Fabric item to be created
-        args (Namespace): Command arguments, may contain 'output_batch' for batch operations
-    
+        item (Item): The Fabric item to be created.
+        args (Namespace): Command arguments. May include `output_batch` used to
+            accumulate results during dependency operations.
+
     Returns:
-        str | None: Created item ID if successful, None if failed
+        str | None: The created item ID for root operations, or None for dependency
+        operations or failed creations.
     """
     # Determine if this is part of a batch operation
     is_root_operation = not hasattr(args, 'output_batch')