Mark "root" as required.

pkgs/dart_mcp/CHANGELOG.md

@@ -3,6 +3,7 @@
 - Update the tool calling example to include progress notifications.
 - Remove a reference to "screenshot" for a generic error that occurs for more
   than just screenshots.
+- Mark the "root" parameter for create_project required.
 
 ## 0.3.3
 

pkgs/dart_mcp_server/lib/src/mixins/dash_cli.dart

@@ -253,7 +253,11 @@ base mixin DashCliSupport on ToolsSupport, LoggingSupport, RootsTrackingSupport
               'boilerplate and example code. Defaults to true.',
         ),
       },
-      required: [ParameterNames.directory, ParameterNames.projectType],
+      required: [
+        ParameterNames.directory,
+        ParameterNames.projectType,
+        ParameterNames.root,
+      ],
     ),
   );
 

pkgs/dart_mcp_server/test/tools/dart_cli_test.dart

@@ -434,7 +434,7 @@ dependencies:
         expect(result.isError, true);
         expect(
           (result.content.first as TextContent).text,
-          contains('missing `root` key'),
+          contains('Required property "root" is missing'),
         );
         expect(testProcessManager.commandsRan, isEmpty);
       });