Change name

registry.Register(new AgentTool(            ChangeNameName,            "Changes the name of the assistant.",            args => {                string newName = ParseName(args);                if (string.IsNullOrWhiteSpace(newName)) return "Error: name cannot be empty.";                registry.InvokeNameChanged(newName);                return $"Success: Name changed to {newName}.";            },            new {                type = "object",                properties = new {                    name = new { type = "string", description = "The new name for the assistant." }                },                required = new[] { "name" }            }));