Looking forward to that day. None of the major MCP clients have implemented that part of the spec yet unfortunately. But as you say, we'll get there...
It cracks me up to no end how the dev tools are much better MCP clients than the web chatbots. Claude Code is so _so_ much better at MCP than Claude Web, which has issues with managing DCR client state, is comparatively terrible at surfacing debug information up, doesn't let regular users see under the hood at how tools are described or called, etc.
Using Claude Code or your IDE of choice to book a hotel is a fun unintended side effect of this.