Feat: Retrieval test #3221 (#7121)

### What problem does this PR solve?

Feat: Retrieval test #3221

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/components/use-knowledge-graph-item.tsx

@@ -34,6 +34,7 @@ export function UseKnowledgeGraphFormField({
     <SwitchFormField
       name={name}
       label={t('chat.useKnowledgeGraph')}
+      tooltip={t('chat.useKnowledgeGraphTip')}
     ></SwitchFormField>
   );
 }