refactor: streamline server and parameter handling in base_mcp_node.py

Author: liuruibin

apps/application/flow/step_node/mcp_node/impl/base_mcp_node.py

@@ -29,16 +29,13 @@ def execute(self, mcp_servers, mcp_server, mcp_tool, mcp_tool_id, mcp_source, to
             if not tool.is_active:
                 raise ValueError(f"Tool with ID {mcp_tool_id} is inactive.")
             servers = json.loads(tool.code)
-            servers = self.handle_variables(servers)  # 处理servers中的变量
-            ToolExecutor().validate_mcp_transport(json.dumps(servers))
-            params = json.loads(json.dumps(tool_params))
-            params = self.handle_variables(params)
         else:
             servers = json.loads(mcp_servers)
-            servers = self.handle_variables(servers)  # 处理servers中的变量
-            ToolExecutor().validate_mcp_transport(json.dumps(servers))
-            params = json.loads(json.dumps(tool_params))
-            params = self.handle_variables(params)
+
+        servers = self.handle_variables(servers)  # 处理servers中的变量
+        ToolExecutor().validate_mcp_transport(json.dumps(servers))
+        params = json.loads(json.dumps(tool_params))
+        params = self.handle_variables(params)
 
         async def call_tool(t, a):
             client = MultiServerMCPClient(servers)