From 76325b7846d6ff25d153fd33205acd50f3a01c70 Mon Sep 17 00:00:00 2001
From: Thomas Sheffler <tom.sheffler@gmail.com>
Date: Mon, 27 Jan 2025 19:04:20 -0800
Subject: [PATCH] progress_token is 0 on first tool-call and the return is
 taken mistakenly

---
 src/mcp/server/fastmcp/server.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mcp/server/fastmcp/server.py b/src/mcp/server/fastmcp/server.py
index 45f1791..5c819df 100644
--- a/src/mcp/server/fastmcp/server.py
+++ b/src/mcp/server/fastmcp/server.py
@@ -599,7 +599,7 @@ class Context(BaseModel):
             else None
         )
 
-        if not progress_token:
+        if progress_token == None:
             return
 
         await self.request_context.session.send_progress_notification(