For Google Home, all of your tags will be recognized as "Thermostat" which can report current temperature and humidity as well as setting temperature monitoring thresholds. Setting the temperature will move the center point of the "comfort zone" i.e. average of the too hot/too cold threshold. Turning it on/off is equivalent to enable/disable temperature monitoring. The tags also support the "Locator" device type which will allow you beep the tag. The integration reports all real-time data to "Google Home Graph" so in near future you should be able to check your live temperature and humidity graph from Google products.
For Alexa, there have been "Informational" skill that will require pronouncing "ask Wireless Tag" to open it, but allows more features (including getting humidity, high/low and average temperature during specified period, arming/disarm motion sensor, setting temperature monitoring thresholds), on the other hand the newly released Smart Home version uses "v3" of Alexa smart home API (which included support for temperature sensor) to support the most commonly used feature of getting temperature and motion state without pronouncing "Wireless Tag" to trigger it.