Update app.py

app.py

@@ -286,12 +286,12 @@ You have access to the following tools:
 
 **TOOL USAGE PROTOCOL:**
 * To call a tool, respond ONLY with a single JSON object formatted exactly like this:
-    [[[JSON_MARKER_START]]]
+    ```
     {{
       "tool": "tool_name",
       "tool_input": {{ "arg_name1": "value1", ... }}
     }}
-    [[[JSON_MARKER_END]]]
+    ```
 * Replace `tool_name` with the tool's name. Provide arguments in `tool_input`. Match names/types precisely.
 * Do not add any text before or after the JSON block.