diff --git a/core/main_terminal.py b/core/main_terminal.py
index 67cc66b..6cfe589 100644
--- a/core/main_terminal.py
+++ b/core/main_terminal.py
@@ -140,7 +140,7 @@ class MainTerminal(MainTerminalCommandMixin, MainTerminalContextMixin, MainTermi
             )
             self.easter_egg_manager = EasterEggManager()
             self._announced_sub_agent_tasks = set()
-            self.silent_tool_disable = False  # 是否静默工具禁用提示
+            self.silent_tool_disable = True  # 是否静默工具禁用提示（默认开启）
             self.current_session_id = 0  # 用于标识不同的任务会话
             # 工具类别（可被管理员动态覆盖）
             self.tool_categories_map = dict(TOOL_CATEGORIES)
diff --git a/core/main_terminal_parts/context.py b/core/main_terminal_parts/context.py
index a2d5688..2980d87 100644
--- a/core/main_terminal_parts/context.py
+++ b/core/main_terminal_parts/context.py
@@ -292,6 +292,14 @@ class MainTerminalContextMixin:
             if isinstance(custom_system_prompt, str) and custom_system_prompt.strip():
                 messages.append({"role": "system", "content": custom_system_prompt.strip()})
 
+            # 禁用工具提示也作为“开头 system prompt”注入，便于后续统一合并。
+            disabled_notice = self._format_disabled_tool_notice()
+            if disabled_notice:
+                messages.append({
+                    "role": "system",
+                    "content": disabled_notice
+                })
+
             # 添加对话历史（保留完整结构，包括tool_calls和tool消息）
             conversation = context["conversation"]
             replaced_tool_count = 0
@@ -377,13 +385,6 @@ class MainTerminalContextMixin:
                     })
 
             # 当前用户输入已经在conversation中了，不需要重复添加
-
-            disabled_notice = self._format_disabled_tool_notice()
-            if disabled_notice:
-                messages.append({
-                    "role": "system",
-                    "content": disabled_notice
-                })
             if shallow_replace_enabled:
                 print(f"[ContextCompression] build_messages 替换tool占位符: {replaced_tool_count} 条")
             return messages
diff --git a/modules/personalization_manager.py b/modules/personalization_manager.py
index bd16232..337bec2 100644
--- a/modules/personalization_manager.py
+++ b/modules/personalization_manager.py
@@ -75,7 +75,7 @@ DEFAULT_PERSONALIZATION_CONFIG: Dict[str, Any] = {
     "shallow_compress_trigger_tool_calls_interval": None,
     "shallow_compress_keep_user_turn_tools": None,  # 保留最近N次用户输入后的工具不压缩（默认3）
     "deep_compress_trigger_tokens": None,
-    "silent_tool_disable": False,  # 禁用工具时不向模型插入提示
+    "silent_tool_disable": True,  # 禁用工具时不向模型插入提示（默认开启）
     "enhanced_tool_display": True,  # 增强工具显示
     "versioning_restore_mode": "overwrite",  # 版本回溯模式固定为 overwrite
     "agents_md_auto_inject": False,  # AGENTS.md 自动注入开关