From bbdb105a2f0c69b10925bc030abdfcefe12e793e Mon Sep 17 00:00:00 2001
From: Fabian Lange <fabian.lange@srccast.de>
Date: Fri, 7 Aug 2026 15:12:31 +0200
Subject: [PATCH] Log exception before returning tool call error result

Fixes #3266
---
 src/mcp/server/mcpserver/server.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/mcp/server/mcpserver/server.py b/src/mcp/server/mcpserver/server.py
index bc79c44a36..7cfcc6236d 100644
--- a/src/mcp/server/mcpserver/server.py
+++ b/src/mcp/server/mcpserver/server.py
@@ -421,6 +421,7 @@ async def _handle_call_tool(
         except MCPError:
             raise
         except Exception as e:
+            logger.exception("Tool call failed")
             return CallToolResult(content=[TextContent(type="text", text=str(e))], is_error=True)
 
     async def _handle_list_resources(