根据mcpserver的安装文档：https://github.com/oceanbase/mcp-oceanbase/blob/main/doc/oceanbase_mcp_server.md
是不是只能启动一个database的MCP服务？
"env": {
"OB_HOST": "localhost",
"OB_PORT": "2881",
"OB_USER": "your_username",
"OB_PASSWORD": "your_password",
"OB_DATABASE": "your_database"
}
我要有多个database都要发布成mcp服务该怎么做？