diff --git a/docs/mcp/modules/mail_intake.credentials.json b/docs/mcp/modules/mail_intake.credentials.json
index 3d5a3b7..f18c4df 100644
--- a/docs/mcp/modules/mail_intake.credentials.json
+++ b/docs/mcp/modules/mail_intake.credentials.json
@@ -247,6 +247,13 @@
             "signature": "<bound method Alias.signature of Alias('Callable', 'collections.abc.Callable')>",
             "docstring": null
           },
+          "Any": {
+            "name": "Any",
+            "kind": "alias",
+            "path": "mail_intake.credentials.redis.Any",
+            "signature": "<bound method Alias.signature of Alias('Any', 'typing.Any')>",
+            "docstring": null
+          },
           "TypeVar": {
             "name": "TypeVar",
             "kind": "alias",
@@ -295,7 +302,7 @@
             "name": "RedisCredentialStore",
             "kind": "class",
             "path": "mail_intake.credentials.redis.RedisCredentialStore",
-            "signature": "<bound method Class.signature of Class('RedisCredentialStore', 35, 137)>",
+            "signature": "<bound method Class.signature of Class('RedisCredentialStore', 35, 145)>",
             "docstring": "Redis-backed implementation of `CredentialStore`.\n\nThis store persists credentials in Redis and is suitable for\ndistributed and horizontally scaled deployments where credentials\nmust be shared across multiple processes or nodes.\n\nNotes:\n    **Responsibilities:**\n\n        - This class is responsible only for persistence and retrieval.\n        - It does not interpret, validate, refresh, or otherwise manage the\n          lifecycle of the credentials being stored.\n\n    **Guarantees:**\n\n        - The store is intentionally generic and delegates all serialization\n          concerns to caller-provided functions.\n        - This avoids unsafe mechanisms such as `pickle` and allows\n          credential formats to be explicitly controlled and audited.",
             "members": {
               "redis": {
@@ -337,31 +344,24 @@
                 "name": "load",
                 "kind": "function",
                 "path": "mail_intake.credentials.redis.RedisCredentialStore.load",
-                "signature": "<bound method Function.signature of Function('load', 80, 105)>",
+                "signature": "<bound method Function.signature of Function('load', 88, 113)>",
                 "docstring": "Load credentials from Redis.\n\nReturns:\n    T | None:\n        An instance of type `T` if credentials are present and\n        successfully deserialized; otherwise `None`.\n\nNotes:\n    **Guarantees:**\n\n        - If no value exists for the configured key, or if the stored\n          payload cannot be successfully deserialized, this method\n          returns `None`.\n        - The store does not attempt to validate the returned\n          credentials or determine whether they are expired or\n          otherwise usable."
               },
               "save": {
                 "name": "save",
                 "kind": "function",
                 "path": "mail_intake.credentials.redis.RedisCredentialStore.save",
-                "signature": "<bound method Function.signature of Function('save', 107, 125)>",
+                "signature": "<bound method Function.signature of Function('save', 115, 133)>",
                 "docstring": "Persist credentials to Redis.\n\nArgs:\n    credentials (T):\n        The credential object to persist.\n\nNotes:\n    **Responsibilities:**\n\n        - Any previously stored credentials under the same key are overwritten\n        - If a TTL is configured, the credentials will expire automatically after the specified duration"
               },
               "clear": {
                 "name": "clear",
                 "kind": "function",
                 "path": "mail_intake.credentials.redis.RedisCredentialStore.clear",
-                "signature": "<bound method Function.signature of Function('clear', 127, 137)>",
+                "signature": "<bound method Function.signature of Function('clear', 135, 145)>",
                 "docstring": "Remove stored credentials from Redis.\n\nNotes:\n    **Lifecycle:**\n\n        - This operation deletes the configured Redis key if it exists\n        - Implementations should treat this method as idempotent"
               }
             }
-          },
-          "Any": {
-            "name": "Any",
-            "kind": "alias",
-            "path": "mail_intake.credentials.redis.Any",
-            "signature": "<bound method Alias.signature of Alias('Any', 'typing.Any')>",
-            "docstring": null
           }
         }
       },
diff --git a/docs/mcp/modules/mail_intake.credentials.redis.json b/docs/mcp/modules/mail_intake.credentials.redis.json
index 8c39459..4325f23 100644
--- a/docs/mcp/modules/mail_intake.credentials.redis.json
+++ b/docs/mcp/modules/mail_intake.credentials.redis.json
@@ -11,6 +11,13 @@
         "signature": "<bound method Alias.signature of Alias('Callable', 'collections.abc.Callable')>",
         "docstring": null
       },
+      "Any": {
+        "name": "Any",
+        "kind": "alias",
+        "path": "mail_intake.credentials.redis.Any",
+        "signature": "<bound method Alias.signature of Alias('Any', 'typing.Any')>",
+        "docstring": null
+      },
       "TypeVar": {
         "name": "TypeVar",
         "kind": "alias",
@@ -59,7 +66,7 @@
         "name": "RedisCredentialStore",
         "kind": "class",
         "path": "mail_intake.credentials.redis.RedisCredentialStore",
-        "signature": "<bound method Class.signature of Class('RedisCredentialStore', 35, 137)>",
+        "signature": "<bound method Class.signature of Class('RedisCredentialStore', 35, 145)>",
         "docstring": "Redis-backed implementation of `CredentialStore`.\n\nThis store persists credentials in Redis and is suitable for\ndistributed and horizontally scaled deployments where credentials\nmust be shared across multiple processes or nodes.\n\nNotes:\n    **Responsibilities:**\n\n        - This class is responsible only for persistence and retrieval.\n        - It does not interpret, validate, refresh, or otherwise manage the\n          lifecycle of the credentials being stored.\n\n    **Guarantees:**\n\n        - The store is intentionally generic and delegates all serialization\n          concerns to caller-provided functions.\n        - This avoids unsafe mechanisms such as `pickle` and allows\n          credential formats to be explicitly controlled and audited.",
         "members": {
           "redis": {
@@ -101,31 +108,24 @@
             "name": "load",
             "kind": "function",
             "path": "mail_intake.credentials.redis.RedisCredentialStore.load",
-            "signature": "<bound method Function.signature of Function('load', 80, 105)>",
+            "signature": "<bound method Function.signature of Function('load', 88, 113)>",
             "docstring": "Load credentials from Redis.\n\nReturns:\n    T | None:\n        An instance of type `T` if credentials are present and\n        successfully deserialized; otherwise `None`.\n\nNotes:\n    **Guarantees:**\n\n        - If no value exists for the configured key, or if the stored\n          payload cannot be successfully deserialized, this method\n          returns `None`.\n        - The store does not attempt to validate the returned\n          credentials or determine whether they are expired or\n          otherwise usable."
           },
           "save": {
             "name": "save",
             "kind": "function",
             "path": "mail_intake.credentials.redis.RedisCredentialStore.save",
-            "signature": "<bound method Function.signature of Function('save', 107, 125)>",
+            "signature": "<bound method Function.signature of Function('save', 115, 133)>",
             "docstring": "Persist credentials to Redis.\n\nArgs:\n    credentials (T):\n        The credential object to persist.\n\nNotes:\n    **Responsibilities:**\n\n        - Any previously stored credentials under the same key are overwritten\n        - If a TTL is configured, the credentials will expire automatically after the specified duration"
           },
           "clear": {
             "name": "clear",
             "kind": "function",
             "path": "mail_intake.credentials.redis.RedisCredentialStore.clear",
-            "signature": "<bound method Function.signature of Function('clear', 127, 137)>",
+            "signature": "<bound method Function.signature of Function('clear', 135, 145)>",
             "docstring": "Remove stored credentials from Redis.\n\nNotes:\n    **Lifecycle:**\n\n        - This operation deletes the configured Redis key if it exists\n        - Implementations should treat this method as idempotent"
           }
         }
-      },
-      "Any": {
-        "name": "Any",
-        "kind": "alias",
-        "path": "mail_intake.credentials.redis.Any",
-        "signature": "<bound method Alias.signature of Alias('Any', 'typing.Any')>",
-        "docstring": null
       }
     }
   }
diff --git a/docs/mcp/modules/mail_intake.json b/docs/mcp/modules/mail_intake.json
index ba08875..041d5b5 100644
--- a/docs/mcp/modules/mail_intake.json
+++ b/docs/mcp/modules/mail_intake.json
@@ -891,6 +891,13 @@
                 "signature": "<bound method Alias.signature of Alias('Callable', 'collections.abc.Callable')>",
                 "docstring": null
               },
+              "Any": {
+                "name": "Any",
+                "kind": "alias",
+                "path": "mail_intake.credentials.redis.Any",
+                "signature": "<bound method Alias.signature of Alias('Any', 'typing.Any')>",
+                "docstring": null
+              },
               "TypeVar": {
                 "name": "TypeVar",
                 "kind": "alias",
@@ -939,7 +946,7 @@
                 "name": "RedisCredentialStore",
                 "kind": "class",
                 "path": "mail_intake.credentials.redis.RedisCredentialStore",
-                "signature": "<bound method Class.signature of Class('RedisCredentialStore', 35, 137)>",
+                "signature": "<bound method Class.signature of Class('RedisCredentialStore', 35, 145)>",
                 "docstring": "Redis-backed implementation of `CredentialStore`.\n\nThis store persists credentials in Redis and is suitable for\ndistributed and horizontally scaled deployments where credentials\nmust be shared across multiple processes or nodes.\n\nNotes:\n    **Responsibilities:**\n\n        - This class is responsible only for persistence and retrieval.\n        - It does not interpret, validate, refresh, or otherwise manage the\n          lifecycle of the credentials being stored.\n\n    **Guarantees:**\n\n        - The store is intentionally generic and delegates all serialization\n          concerns to caller-provided functions.\n        - This avoids unsafe mechanisms such as `pickle` and allows\n          credential formats to be explicitly controlled and audited.",
                 "members": {
                   "redis": {
@@ -981,31 +988,24 @@
                     "name": "load",
                     "kind": "function",
                     "path": "mail_intake.credentials.redis.RedisCredentialStore.load",
-                    "signature": "<bound method Function.signature of Function('load', 80, 105)>",
+                    "signature": "<bound method Function.signature of Function('load', 88, 113)>",
                     "docstring": "Load credentials from Redis.\n\nReturns:\n    T | None:\n        An instance of type `T` if credentials are present and\n        successfully deserialized; otherwise `None`.\n\nNotes:\n    **Guarantees:**\n\n        - If no value exists for the configured key, or if the stored\n          payload cannot be successfully deserialized, this method\n          returns `None`.\n        - The store does not attempt to validate the returned\n          credentials or determine whether they are expired or\n          otherwise usable."
                   },
                   "save": {
                     "name": "save",
                     "kind": "function",
                     "path": "mail_intake.credentials.redis.RedisCredentialStore.save",
-                    "signature": "<bound method Function.signature of Function('save', 107, 125)>",
+                    "signature": "<bound method Function.signature of Function('save', 115, 133)>",
                     "docstring": "Persist credentials to Redis.\n\nArgs:\n    credentials (T):\n        The credential object to persist.\n\nNotes:\n    **Responsibilities:**\n\n        - Any previously stored credentials under the same key are overwritten\n        - If a TTL is configured, the credentials will expire automatically after the specified duration"
                   },
                   "clear": {
                     "name": "clear",
                     "kind": "function",
                     "path": "mail_intake.credentials.redis.RedisCredentialStore.clear",
-                    "signature": "<bound method Function.signature of Function('clear', 127, 137)>",
+                    "signature": "<bound method Function.signature of Function('clear', 135, 145)>",
                     "docstring": "Remove stored credentials from Redis.\n\nNotes:\n    **Lifecycle:**\n\n        - This operation deletes the configured Redis key if it exists\n        - Implementations should treat this method as idempotent"
                   }
                 }
-              },
-              "Any": {
-                "name": "Any",
-                "kind": "alias",
-                "path": "mail_intake.credentials.redis.Any",
-                "signature": "<bound method Alias.signature of Alias('Any', 'typing.Any')>",
-                "docstring": null
               }
             }
           },
diff --git a/mail_intake/credentials/redis.py b/mail_intake/credentials/redis.py
index dcba383..9d64fe2 100644
--- a/mail_intake/credentials/redis.py
+++ b/mail_intake/credentials/redis.py
@@ -25,7 +25,7 @@ responsibility of authentication provider implementations.
 """
 
 from collections.abc import Callable
-from typing import TypeVar
+from typing import Any, TypeVar
 
 from mail_intake.credentials.store import CredentialStore
 
@@ -57,7 +57,7 @@ class RedisCredentialStore(CredentialStore[T]):
 
     def __init__(
         self,
-        redis_client,
+        redis_client: Any,
         key: str,
         serialize: Callable[[T], bytes],
         deserialize: Callable[[bytes], T],
@@ -66,10 +66,18 @@ class RedisCredentialStore(CredentialStore[T]):
         """
         Initialize a Redis-backed credential store.
 
-        Callers supply all runtime dependencies: ``redis_client`` is an
-        initialized Redis client instance, ``key`` names the storage key,
-        ``serialize``/``deserialize`` are the encoding and decoding callables,
-        and ``ttl_seconds`` optionally limits credential lifetime.
+        Args:
+            redis_client (Any):
+                Initialized Redis client instance used for persistence.
+            key (str):
+                Storage key under which credentials are persisted.
+            serialize (Callable[[T], bytes]):
+                Callable that encodes credentials to bytes for storage.
+            deserialize (Callable[[bytes], T]):
+                Callable that decodes stored bytes back into credentials.
+            ttl_seconds (int | None):
+                Optional time-to-live in seconds after which stored
+                credentials expire automatically. ``None`` disables expiry.
         """
         self.redis = redis_client
         self.key = key