stringly-typed

adjective2

1. •
   Relying on strings to encode or represent structured or semantic data that could otherwise use more appropriate data structures.
2. •
   (humorous) Characterized by an excessive use of strings to represent non-textual data.

   • This is a “stringly typed” example that is easy to break if the key names are mistyped, or change between versions of your app. — 2019