That is correct. I buy a liquid specifically labeled as ‘Umami’ that my family adds to vegetables, rice, etc.

Is the liquid MSG solution or is there something else in there?

No MSG.

So what is it?

Yondu vegetable umami

That seems to be made from fermented soybeans which is also how pure MSG is produced. I’m pretty sure the main active component of this is also just MSG, although they point out that they don’t explicitly add artificial MSG.