diff --git a/astrbot/builtin_stars/web_searcher/main.py b/astrbot/builtin_stars/web_searcher/main.py
index e8388c816..bb864feb8 100644
--- a/astrbot/builtin_stars/web_searcher/main.py
+++ b/astrbot/builtin_stars/web_searcher/main.py
@@ -49,6 +49,18 @@ class Main(star.Star):
         self.sogo_search = Sogo()
         self.baidu_initialized = False
 
+        # Deactivate built-in web search tools if web_search is disabled
+        # This allows MCP to provide custom web_search tools
+        websearch_enable = (
+            provider_settings.get("web_search", False) if provider_settings else False
+        )
+        if not websearch_enable:
+            func_tool_mgr = self.context.get_llm_tool_manager()
+            for tool_name in self.TOOLS:
+                tool = func_tool_mgr.get_func(tool_name)
+                if tool:
+                    tool.active = False
+
     async def _tidy_text(self, text: str) -> str:
         """清理文本，去除空格、换行符等"""
         return text.strip().replace("\n", " ").replace("\r", " ").replace("  ", " ")
@@ -394,6 +406,15 @@ class Main(star.Star):
         websearch_enable = prov_settings.get("web_search", False)
         provider = prov_settings.get("websearch_provider", "default")
 
+        func_tool_mgr = self.context.get_llm_tool_manager()
+
+        # Globally activate/deactivate built-in web search tools based on config
+        # This allows MCP to provide custom web_search tools when built-in is disabled
+        for tool_name in self.TOOLS:
+            tool = func_tool_mgr.get_func(tool_name)
+            if tool:
+                tool.active = websearch_enable
+
         tool_set = req.func_tool
         if isinstance(tool_set, FunctionToolManager):
             req.func_tool = tool_set.get_full_tool_set()