We use agent to have the inventory of equipment but even is the asset didn't have any change the agent should report and add something like I'm live message or the possibility to do an inventory on demand, so If I need to know in a moment the software of hardware of a specific asset I can program an update o reinventory on demand.
I hope you can add it on new release.
Under Admin -> Discovery -> Agents you should be able to find the list machines that were scanned along with last sync time.
However, there is no option for on demand re-inventory. I will this pass requirement to product team to consider this for future roadmap.
I will convert this forum as a ticket for better tracking.