diff --git a/astrbot/_internal/tools/base.py b/astrbot/_internal/tools/base.py
index 78f389f3e..a5ad26567 100644
--- a/astrbot/_internal/tools/base.py
+++ b/astrbot/_internal/tools/base.py
@@ -104,6 +104,10 @@ class ToolSet:
         """Remove and return a tool by name."""
         return self._tools.pop(name, None)
 
+    def remove_tool(self, name: str) -> None:
+        """Remove a tool by its name."""
+        self._tools.pop(name, None)
+
     def get(self, name: str) -> FunctionTool | None:
         """Get a tool by name."""
         return self._tools.get(name)
@@ -126,3 +130,23 @@ class ToolSet:
     def tools(self) -> list[FunctionTool]:
         """List all tools in this set."""
         return list(self._tools.values())
+
+    def openai_schema(self, omit_empty_parameter_field: bool = False) -> list[dict[str, Any]]:
+        """Convert tools to OpenAI API function calling schema format."""
+        result: list[dict[str, Any]] = []
+        for tool in self._tools.values():
+            func_def: dict[str, Any] = {
+                "type": "function",
+                "function": {"name": tool.name},
+            }
+            if tool.description:
+                func_def["function"]["description"] = tool.description
+
+            if tool.parameters is not None:
+                if (
+                    tool.parameters.get("properties")
+                ) or not omit_empty_parameter_field:
+                    func_def["function"]["parameters"] = tool.parameters
+
+            result.append(func_def)
+        return result
diff --git a/astrbot/_internal/tools/registry.py b/astrbot/_internal/tools/registry.py
index 2b27d1046..d71052552 100644
--- a/astrbot/_internal/tools/registry.py
+++ b/astrbot/_internal/tools/registry.py
@@ -48,24 +48,34 @@ class FunctionToolManager:
     """Central registry for all function tools."""
 
     def __init__(self) -> None:
-        self.func_list: list[FunctionTool] = []
+        self._func_list: list[FunctionTool] = []
+
+    @property
+    def func_list(self) -> list[FunctionTool]:
+        """Get the list of function tools."""
+        return self._func_list
+
+    @func_list.setter
+    def func_list(self, value: list[FunctionTool]) -> None:
+        """Set the list of function tools."""
+        self._func_list = value
 
     def add(self, tool: FunctionTool) -> None:
         """Add a tool to the registry."""
-        self.func_list.append(tool)
+        self._func_list.append(tool)
 
     def remove(self, name: str) -> bool:
         """Remove a tool by name. Returns True if found."""
-        for i, f in enumerate(self.func_list):
+        for i, f in enumerate(self._func_list):
             if f.name == name:
-                self.func_list.pop(i)
+                self._func_list.pop(i)
                 return True
         return False
 
     def get_func(self, name: str) -> FunctionTool | None:
         """Get a tool by name. Returns the last active tool if multiple match."""
         last_match: FunctionTool | None = None
-        for f in reversed(self.func_list):
+        for f in reversed(self._func_list):
             if f.name == name:
                 if getattr(f, "active", True):
                     return f
@@ -76,7 +86,7 @@ class FunctionToolManager:
     def get_full_tool_set(self) -> ToolSet:
         """Return a ToolSet with all active tools, deduplicated by name."""
         seen: dict[str, FunctionTool] = {}
-        for tool in reversed(self.func_list):
+        for tool in reversed(self._func_list):
             if tool.name not in seen and getattr(tool, "active", True):
                 seen[tool.name] = tool
         return ToolSet("default", list(seen.values()))
@@ -90,6 +100,57 @@ class FunctionToolManager:
             if self.get_func(tool.name) is None:
                 self.add(tool)
 
+    # MCP-related stub methods for base class compatibility
+    async def enable_mcp_server(
+        self, name: str, config: dict[str, Any], init_timeout: int = 30
+    ) -> None:
+        """Enable an MCP server (stub)."""
+        pass
+
+    async def disable_mcp_server(
+        self, name: str = "", timeout: int = 10, shutdown_timeout: int = 10
+    ) -> None:
+        """Disable an MCP server (stub)."""
+        pass
+
+    async def init_mcp_clients(self) -> None:
+        """Initialize MCP clients (stub)."""
+        pass
+
+    async def test_mcp_server_connection(self, config: dict[str, Any]) -> tuple[bool, str]:
+        """Test MCP server connection (stub)."""
+        return False, "Not implemented"
+
+    async def sync_modelscope_mcp_servers(self) -> None:
+        """Sync ModelScope MCP servers (stub)."""
+        pass
+
+    def load_mcp_config(self) -> dict[str, Any]:
+        """Load MCP configuration (stub)."""
+        return {"mcpServers": {}}
+
+    def save_mcp_config(self, config: dict[str, Any]) -> bool:
+        """Save MCP configuration (stub)."""
+        return True
+
+    def activate_llm_tool(self, name: str) -> bool:
+        """Activate an LLM tool (stub)."""
+        return True
+
+    def deactivate_llm_tool(self, name: str) -> bool:
+        """Deactivate an LLM tool (stub)."""
+        return True
+
+    @property
+    def mcp_client_dict(self) -> dict[str, Any]:
+        """Return dict of MCP clients (stub)."""
+        return {}
+
+    @property
+    def mcp_server_runtime_view(self) -> dict[str, Any]:
+        """Return runtime view of MCP servers (stub)."""
+        return {}
+
 
 class FuncCall(FunctionToolManager):
     """Alias for FunctionToolManager for backward compatibility."""
@@ -97,12 +158,68 @@ class FuncCall(FunctionToolManager):
     def __init__(self) -> None:
         super().__init__()
         self._mcp_server_runtime_view: dict[str, Any] = {}
+        self._mcp_client_dict: dict[str, Any] = {}
 
     @property
     def mcp_server_runtime_view(self) -> dict[str, Any]:
         """Return runtime view of MCP servers."""
         return self._mcp_server_runtime_view
 
+    @property
+    def mcp_client_dict(self) -> dict[str, Any]:
+        """Return dict of MCP clients (for backward compatibility)."""
+        return self._mcp_client_dict
+
+    async def init_mcp_clients(self) -> None:
+        """Initialize MCP clients (stub implementation)."""
+        pass
+
+    def add_func(
+        self,
+        name: str,
+        func_args: list[dict[str, Any]],
+        desc: str,
+        handler: Any,
+    ) -> None:
+        """Add a function tool (deprecated, use add() instead)."""
+        params: dict[str, Any] = {
+            "type": "object",
+            "properties": {},
+        }
+        for param in func_args:
+            params["properties"][param["name"]] = {
+                "type": param.get("type", "string"),
+                "description": param.get("description", ""),
+            }
+        func = FunctionTool(
+            name=name,
+            parameters=params,
+            description=desc,
+            handler=handler,
+        )
+        self.add(func)
+
+    def remove_func(self, name: str) -> None:
+        """Remove a function tool by name (deprecated, use remove() instead)."""
+        self.remove(name)
+
+    def get_func(self, name: str) -> FunctionTool | None:
+        """Get a function tool by name."""
+        return super().get_func(name)
+
+    def names(self) -> list[str]:
+        """Get all tool names."""
+        return [f.name for f in self.func_list]
+
+    def remove_tool(self, name: str) -> None:
+        """Remove a tool by its name (alias for remove)."""
+        self.remove(name)
+
+    def get_func_desc_openai_style(self, omit_empty_parameter_field: bool = False) -> list[dict[str, Any]]:
+        """Get tools in OpenAI style (deprecated, use get_full_tool_set().openai_schema())."""
+        tool_set = self.get_full_tool_set()
+        return tool_set.openai_schema(omit_empty_parameter_field)
+
     async def enable_mcp_server(
         self, name: str, config: dict[str, Any], init_timeout: int = 30
     ) -> None: