diff --git a/minecraft/exceptions.py b/minecraft/exceptions.py
index bdb1ecd..5f2f26f 100644
--- a/minecraft/exceptions.py
+++ b/minecraft/exceptions.py
@@ -6,7 +6,14 @@ Contains the `Exceptions` used by this library.
 class YggdrasilError(Exception):
     """
     Base `Exception` for the Yggdrasil authentication service.
+
+    :param str message: A human-readable string representation of the error.
+    :param int status_code: Initial value of :attr:`status_code`.
+    :param str yggdrasil_error: Initial value of :attr:`yggdrasil_error`.
+    :param str yggdrasil_message: Initial value of :attr:`yggdrasil_message`.
+    :param str yggdrasil_cause: Initial value of :attr:`yggdrasil_cause`.
     """
+
     def __init__(
         self,
         message=None,
@@ -14,17 +21,33 @@ class YggdrasilError(Exception):
         yggdrasil_error=None,
         yggdrasil_message=None,
         yggdrasil_cause=None,
-        *args
     ):
-        if message is not None:
-            args = (message,) + args
-        super(YggdrasilError, self).__init__(*args)
-
+        super(YggdrasilError, self).__init__(message)
         self.status_code = status_code
         self.yggdrasil_error = yggdrasil_error
         self.yggdrasil_message = yggdrasil_message
         self.yggdrasil_cause = yggdrasil_cause
 
+    status_code = None
+    """`int` or `None`. The associated HTTP status code. May be set."""
+
+    yggdrasil_error = None
+    """`str` or `None`. The `"error"` field of the Yggdrasil response: a short
+       description such as `"Method Not Allowed"` or
+       `"ForbiddenOperationException"`. May be set.
+    """
+
+    yggdrasil_message = None
+    """`str` or `None`. The `"errorMessage"` field of the Yggdrasil response:
+       a longer description such as `"Invalid credentials. Invalid username or
+       password."`. May be set.
+    """
+
+    yggdrasil_cause = None
+    """`str` or `None`. The `"cause"` field of the Yggdrasil response: a string
+       containing additional information about the error. May be set.
+    """
+
 
 class VersionMismatch(Exception):
     pass