diff --git a/agent/prompt_builder.py b/agent/prompt_builder.py
index c61d6995b..e7bb0ffc9 100644
--- a/agent/prompt_builder.py
+++ b/agent/prompt_builder.py
@@ -295,7 +295,9 @@ PLATFORM_HINTS = {
     ),
     "telegram": (
         "You are on a text messaging communication platform, Telegram. "
-        "Please do not use markdown as it does not render. "
+        "Standard markdown is automatically converted to Telegram format. "
+        "Supported: **bold**, *italic*, ~~strikethrough~~, ||spoiler||, "
+        "`inline code`, ```code blocks```, [links](url), and ## headers. "
         "You can send media files natively: to deliver a file to the user, "
         "include MEDIA:/absolute/path/to/file in your response. Images "
         "(.png, .jpg, .webp) appear as photos, audio (.ogg) sends as voice "