execute method
Execute the tool with the given input.
Implementation
@override
Future<ToolResult> execute(Map<String, dynamic> input) async {
final validation = validateInput(input);
if (!validation.isValid) return ToolResult.error(validation.error!);
final parsed = ComputerUseInput.fromJson(input);
if (automator != null) return automator!(parsed);
return ToolResult.error(
'No GUI automator configured. '
'Wire up a computer-use backend to use this tool.',
);
}