diff --git a/printer-linter/src/printerlinter/diagnostic.py b/printer-linter/src/printerlinter/diagnostic.py
index a6843ed38f..a379ff6ba2 100644
--- a/printer-linter/src/printerlinter/diagnostic.py
+++ b/printer-linter/src/printerlinter/diagnostic.py
@@ -1,5 +1,20 @@
+from pathlib import Path
+from typing import Optional, List
+
+from .replacement import Replacement
+
+
 class Diagnostic:
-    def __init__(self, file, diagnostic_name, message, level, offset, replacements=None) -> None:
+    def __init__(self, file: Path, diagnostic_name: str, message: str, level: str, offset: int, replacements: Optional[List[Replacement]] = None) -> None:
+        """ A diagnosis of an issue in "file" at "offset" in that file. May include suggested replacements.
+
+        @param file: The path to the file this diagnostic is for.
+        @param diagnostic_name: The name of the diagnostic rule that spawned this result. A list can be found in .printer-linter.
+        @param message: A message explaining the issue with this piece of text.
+        @param level: How important this diagnostic is, ranges from Warning -> Error.
+        @param offset: The offset in file where the issue is.
+        @param replacements: A list of Replacement that contain replacement text.
+        """
         self.file = file
         self.diagnostic_name = diagnostic_name
         self.message = message
@@ -8,13 +23,12 @@ class Diagnostic:
         self.replacements = replacements
 
     def toDict(self) -> dict:
-        diagnostic_dict = {"DiagnosticName": self.diagnostic_name,
-                           "DiagnosticMessage": {
-                               "Message": self.message,
-                               "FilePath": self.file.as_posix(),
-                               "FileOffset": self.offset,
-                               "Replacements": [] if self.replacements is None else [r.toDict() for r in self.replacements],
-                           },
-                           "Level": self.level
-                           }
-        return diagnostic_dict
+        return {"DiagnosticName": self.diagnostic_name,
+                "DiagnosticMessage": {
+                    "Message": self.message,
+                    "FilePath": self.file.as_posix(),
+                    "FileOffset": self.offset,
+                    "Replacements": [] if self.replacements is None else [r.toDict() for r in self.replacements],
+                },
+                "Level": self.level
+                }