Looks like a canister purge solenoid. They often click at idle repeatedly and are quite noticeable. That is normal for it. Nothing serious to worry about
If you need a new one It's hard to source the right part from the oreilleys or autozone. What they say is the right part is not the right part. Same for Amazon. This is one of those "just stick with OEM Toyota" situations.
Check around your evap can for any cracks while your looking.