Using notifications/tools/list_changed

[evacchi]

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Discussion Topic

I have been trying to find an example usage for the tools/list_changed API.

From my understanding, a server should declare the capability:

      "capabilities": {
        "resources": {},
        "tools": {
          "listChanged": true
        }
      }

then, when the list changes, it should send the message, upon which the client (I guess) would send a new tools/list request.

Using Claude Desktop as a client, I slightly modified the weather server to send a few notifications and append a new tool to the list, but it does not seem like the change is followed by a tools/list request from the client.

Is Claude Desktop implementing this feature, and if it is, what am I missing?

Thanks!

[jspahrsummers]

You're using it correctly, but Claude Desktop doesn't support this at the moment—sorry for the confusion.

[evacchi]

thanks!

[MaXal]

@jspahrsummers Are there any estimates when this will be available? Our MCP connects to IDE and it's weird that you need to restart Claude Client after starting IDE.