diff --git a/src/Providers/XAI/Maps/ToolMap.php b/src/Providers/XAI/Maps/ToolMap.php
index 59ef7466e..cb82bf8ba 100644
--- a/src/Providers/XAI/Maps/ToolMap.php
+++ b/src/Providers/XAI/Maps/ToolMap.php
@@ -5,6 +5,7 @@
 namespace Prism\Prism\Providers\XAI\Maps;
 
 use Prism\Prism\Tool;
+use stdClass;
 
 class ToolMap
 {
@@ -21,7 +22,7 @@ public static function Map(array $tools): array
                 'description' => $tool->description(),
                 'parameters' => [
                     'type' => 'object',
-                    'properties' => $tool->parametersAsArray(),
+                    'properties' => $tool->parametersAsArray() ?: new stdClass(),
                     'required' => $tool->requiredParameters(),
                 ],
             ],