diff --git a/backend/open_webui/internal/config.py b/backend/open_webui/internal/config.py
index 46f5b1b67d..7b18c362da 100644
--- a/backend/open_webui/internal/config.py
+++ b/backend/open_webui/internal/config.py
@@ -233,6 +233,11 @@ class AppConfig:
         except Exception as exc:
             log.error("Async persist failed for '%s': %s", name, exc)
 
+    async def commit(self, name: str) -> None:
+        """Await the durable DB write of one entry, raising on failure (__setattr__'s write is fire-and-forget)."""
+        if _persist_enabled:
+            await self._entries[name].commit_async()
+
     def __getattr__(self, name: str) -> Any:
         entries = super().__getattribute__('_entries')
         if name not in entries:
diff --git a/backend/open_webui/routers/configs.py b/backend/open_webui/routers/configs.py
index c40131f41f..f2ef22bea3 100644
--- a/backend/open_webui/routers/configs.py
+++ b/backend/open_webui/routers/configs.py
@@ -197,6 +197,14 @@ async def set_tool_servers_config(
         connection.model_dump() for connection in form_data.TOOL_SERVER_CONNECTIONS
     ]
 
+    # The write above is fire-and-forget and swallows errors; confirm it reached disk so a
+    # persistence failure fails closed (HTTP 500) instead of returning a silent success.
+    try:
+        await request.app.state.config.commit('TOOL_SERVER_CONNECTIONS')
+    except Exception as e:
+        log.error(f'Failed to persist tool server connections: {e}')
+        raise HTTPException(status_code=500, detail='Failed to persist tool server configuration')
+
     await set_tool_servers(request)
 
     for connection in request.app.state.config.TOOL_SERVER_CONNECTIONS: