diff --git a/client/src/App.tsx b/client/src/App.tsx
index 323b0996..04794df0 100644
--- a/client/src/App.tsx
+++ b/client/src/App.tsx
@@ -801,6 +801,8 @@ const App = () => {
       );
 
       setToolResult(response);
+      // Clear any validation errors since tool execution completed
+      setErrors((prev) => ({ ...prev, tools: null }));
     } catch (e) {
       const toolResult: CompatibilityCallToolResult = {
         content: [
@@ -812,6 +814,8 @@ const App = () => {
         isError: true,
       };
       setToolResult(toolResult);
+      // Clear validation errors - tool execution errors are shown in ToolResults
+      setErrors((prev) => ({ ...prev, tools: null }));
     }
   };
 
diff --git a/client/src/components/ToolsTab.tsx b/client/src/components/ToolsTab.tsx
index c9825983..0123296a 100644
--- a/client/src/components/ToolsTab.tsx
+++ b/client/src/components/ToolsTab.tsx
@@ -131,14 +131,15 @@ const ToolsTab = ({
             </h3>
           </div>
           <div className="p-4">
-            {error ? (
-              <Alert variant="destructive">
-                <AlertCircle className="h-4 w-4" />
-                <AlertTitle>Error</AlertTitle>
-                <AlertDescription>{error}</AlertDescription>
-              </Alert>
-            ) : selectedTool ? (
+            {selectedTool ? (
               <div className="space-y-4">
+                {error && (
+                  <Alert variant="destructive">
+                    <AlertCircle className="h-4 w-4" />
+                    <AlertTitle>Error</AlertTitle>
+                    <AlertDescription>{error}</AlertDescription>
+                  </Alert>
+                )}
                 <p className="text-sm text-gray-600 dark:text-gray-400">
                   {selectedTool.description}
                 </p>