initialize method
Invoked by the client as a part of initialization.
Tools should usually be registered in this function using registerTool when possible.
If tools are registered after initialized completes, then the server will notify the client
Implementation
@override
FutureOr<InitializeResult> initialize(InitializeRequest request) async {
registerRequestHandler(ListToolsRequest.methodName, _listTools);
registerRequestHandler(CallToolRequest.methodName, _callTool);
final result = await super.initialize(request);
(result.capabilities.tools ??= Tools()).listChanged = true;
return result;
}