diff --git a/backend/packages/harness/deerflow/mcp/cache.py b/backend/packages/harness/deerflow/mcp/cache.py
index 38750e135..c1121f59d 100644
--- a/backend/packages/harness/deerflow/mcp/cache.py
+++ b/backend/packages/harness/deerflow/mcp/cache.py
@@ -118,9 +118,13 @@ def get_cached_mcp_tools() -> list[BaseTool]:
                 loop.run_until_complete(initialize_mcp_tools())
         except RuntimeError:
             # No event loop exists, create one
-            asyncio.run(initialize_mcp_tools())
-        except Exception as e:
-            logger.error(f"Failed to lazy-initialize MCP tools: {e}")
+            try:
+                asyncio.run(initialize_mcp_tools())
+            except Exception:
+                logger.exception("Failed to lazy-initialize MCP tools")
+                return []
+        except Exception:
+            logger.exception("Failed to lazy-initialize MCP tools")
             return []
 
     return _mcp_tools_cache or []