Please help me out with the mcp tool in Vapi and how it would list all the tools from my n8n mcp server? Let m know how i can list the tools . and not get a 500 error https://cdn.discordapp.com/attachments/1211484481848873020/1463061335955738797/8Dz7FvTrBihhIAAAAASUVORK5CYII.png?ex=6970758c&is=696f240c&hm=bc266aff429d006967b4de353b85eacf40f3aa66f88c17692d7c9ba363ccc519&