The study, https://www.science.org/doi/10.1126/sciadv.ade4687 suggests in figure 1 that the device is 0.5mg of molybdenum and dissolves over an 18 day period, ~30µg/day. This is less than your recommended dietary allowance of 45µg/day and about two orders of magnitude under the tolerable upper intake level.

You will also find in the study analysis of what compounds the molybdenum forms as it dissolves.

Also, who knew they were supposed to be getting molybdenum every day? Somehow I feel a bit more cyborgy now, like maybe there is a tiny gear in me somewhere that needs to be greased.