Saqib Ullah has a really good blog post on custom Visual Studio visualizers. You should Check his post out if your ever in the need of a custom visualizer.
If you have spent any time looking at the documentation for Microsoft CosmosDB / DocumentDB, you will see a lot of examples where the data model has a property named "Tags" that is a list of strings. But you don't see many times they query on something in that Tag property... One example I saw a query on Tags[0] = "some value" I don't know how often I will need that, but you know, good to know you can do it. After looking through the SQL syntax reference . The 2 ways I most likely query the Tags would be to use a join on the Tags property or use the ARRAY_CONTAINS function. Side note; the performance of the two methods are basically identical, leading me to believe the query optimizer generates the same instruction sets for both. So unless you have an array of complex objects, just use ARRAY_CONTAINS. Cool, we know how to query for documents that have our tag on them now... One small problem, when you load a million, or even a hundred thousand do...