[Minor] adding known issues paragraph

Author: remyCases

README.md

@@ -1,6 +1,9 @@
 # ModShardDiff
 
-A cli tool to export differences between two .win files. 
+A cli tool to export differences between two .win files from the same GameMaker-based game. 
+
+> [!NOTE]  
+> This tool relies heavily on [UTMT](https://github.com/UnderminersTeam/UndertaleModTool).
 
 ## What will I get from this tool ?
 
@@ -30,4 +33,8 @@ The diff for `Codes` and `GameObjects` is made using the `diff-match-patch` lib,
 
 #### Using the CLI:
 
-To compare `data_modified.win` from `data_vanilla.win` and export the results in the folder `PATH/TO/EXPORT`, run `msd -n data_modified.win -r data_vanilla.win -o PATH/TO/EXPORT`.
+To compare `data_modified.win` from `data_vanilla.win` and export the results in the folder `PATH/TO/EXPORT`, run `msd -n data_modified.win -r data_vanilla.win -o PATH/TO/EXPORT`.
+
+## Known issues
+
+This tool assumes that each element (`Codes`, `GameObjects`, `Sprites`, ...) is named with a unique name. If for any reasons, some elements share the same name (for instance two `Codes` using the same name), the tool will export only one (and maybe the one you are not interested in).