diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_tools_mcp.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_tools_mcp.rs
index 482b375e1..545ea261d 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/direct_tools_mcp.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/direct_tools_mcp.rs
@@ -453,7 +453,7 @@ fn direct_tools_mcp_specs_for(controlled_web_search: bool, _cocos_editor_availab
                         "backgroundMode": {
                             "type": "string",
                             "enum": ["complex", "flat"],
-                            "description": "可选抠图模式；省略时兼容旧行为并使用 complex"
+                            "description": "可选抠图模式；省略时使用 complex"
                         },
                         "screenColor": {
                             "type": "string",