As far as I know WKT doesn't really support any kind of label as it just represents the geometry itself. What you could do is however just store it as comma separated list eg:
You should then be able to display this with X GIS program. QGIS can open and display text files with a comma separated list of WKT objects using the Delimited Text plugin.
Well known text for geometry is defined in OGC 01-103r4 (amongst other places). Section 7 of that document provides the syntax. There is also a list of SQL functions relating to those in Part 2 of the Simple Features spec (also an OGC product).
The ISO documents are just a more expensive way to get much the same thing.
There are useful extensions such as the Extended WKT (EWKT) that is defined by PostGIS and supported by various other tools such as SpatiaLite, and provides the SRS, which you probably want.
Update: As pointed out in a comment, there is also WKT representation for Coordinate Reference Systems: OGC 18-010r7. However these two WKT forms are using similar syntax to describe different things - one is for a geometry (e.g. a linestring), and the other for a CRS (e.g. for a geometric or temporal datum).
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@nmtoken