When showing the results of a find references or call hierarchy request, I'd like the UI to display if a reference or method call in the result is accessing an element (e.g. a variable) by reading or writing it or both. For that purpose, an LSP specification PR suggests to introduce new tags and to adapt the find references response's return type.

For example, the call hierarchy view in CDT (classic C/C++ editor) shows overlay icons with an "R" for read access, "W" for write access, or "RW" for both (see screenshot and see original LSP issue microsoft/language-server-protocol#2207)