diff --git a/src/options.tsx b/src/options.tsx
index 7e1f0c4..62e11f5 100644
--- a/src/options.tsx
+++ b/src/options.tsx
@@ -104,7 +104,7 @@ function PromptSettings() {
   const [prompt, setPrompt] = useState<string | undefined>(DEFAULT_PROMPT);
   const [isPromptValid, setIsPromptValid] = useState<boolean>(true);
 
-  const promptFormatWarning: string = `{{types}} must be in the prompt`;
+  const promptFormatWarning: string = `{{tabURL}} {{tabTitle}} {{types}} must be in the prompt`;
 
   useEffect(() => {
     getStorage<string>("prompt").then(setPrompt);
diff --git a/src/services.ts b/src/services.ts
index 26f0330..c521666 100644
--- a/src/services.ts
+++ b/src/services.ts
@@ -23,14 +23,15 @@ const renderPrompt = async (
   return [
     {
       role: "system",
-      content: "Act as a brwoser tab group classificator",
+      content: "You are a brwoser tab group classificator",
     },
     {
       role: "user",
-      content:
-        Mustache.render(prompt, {
-          types: types.join(", "),
-        }) + `, tab url: "${tab.url}", tab title: "${tab.title}"`,
+      content: Mustache.render(prompt, {
+        tabURL: tab.url,
+        tabTitle: tab.title,
+        types: types.join(", "),
+      }),
     },
   ];
 };
diff --git a/src/utils.ts b/src/utils.ts
index f5b26c2..88cc9fb 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -34,8 +34,8 @@ export const DEFAULT_GROUP = [
 ];
 
 export const DEFAULT_PROMPT: string =
-  `Classify the tab group base on the provided URL and title into one of the categories: ` +
-  `[{{types}}], response with the category only, without any comments.`;
+  `Classify the tab group base on the provided URL ({{tabURL}}) and title (tabTitle) into one of the categories: ` +
+  `{{types}}. Response with the category only, without any comments.`;
 
 export function matchesRule(url: URL, rule: FilterRuleItem) {
   const { type, rule: value } = rule;