diff --git a/src/digimarks/exceptions.py b/src/digimarks/exceptions.py
index a5bded8..c896896 100644
--- a/src/digimarks/exceptions.py
+++ b/src/digimarks/exceptions.py
@@ -2,20 +2,24 @@
 
 
 class BookmarkNotFound(Exception):
-    def __init__(self, message='Bookmark not found'):
+    """A bookmark was not found."""
+
+    def __init__(self, message: str ='Bookmark not found'):
         """Initialise the exception.
 
         :param str message: The message for the exception
         """
         super().__init__(message)
-        self.message = message
+        self.message: str = message
 
 
 class BookmarkAlreadyExists(Exception):
-    def __init__(self, message='Bookmark already exists'):
+    """A bookmark already exists for this URL and this user."""
+
+    def __init__(self, message: str ='Bookmark already exists'):
         """Initialise the exception.
 
         :param str message: The message for the exception
         """
         super().__init__(message)
-        self.message = message
+        self.message: str = message
diff --git a/src/digimarks/main.py b/src/digimarks/main.py
index f1536d6..1101875 100644
--- a/src/digimarks/main.py
+++ b/src/digimarks/main.py
@@ -299,7 +299,7 @@ async def list_bookmarks_for_tag_for_user(
     tag_key: str,
 ) -> list[str]:
     """List all tags in use by the user."""
-    logger.info('List bookmarks for tag %s user %s', user_key)
+    logger.info('List bookmarks for tag "%s" by user %s', tag_key, user_key)
     return await tags_service.list_bookmarks_for_tag_for_user(session, user_key, tag_key)
 
 
diff --git a/src/digimarks/models.py b/src/digimarks/models.py
index df5a252..193efef 100644
--- a/src/digimarks/models.py
+++ b/src/digimarks/models.py
@@ -5,7 +5,7 @@ Contains the bookmarks administration, users, tags, public tags and more.
 
 from datetime import UTC, datetime
 from http import HTTPStatus
-from typing import Optional, Type, TypeVar
+from typing import TypeVar
 
 from pydantic import AnyUrl, computed_field
 from sqlmodel import AutoString, Field, SQLModel
@@ -16,8 +16,6 @@ DEFAULT_THEME = 'freshgreen'
 class User(SQLModel, table=True):
     """User account."""
 
-    __tablename__ = 'user'
-
     id: int = Field(primary_key=True)
     username: str
     key: str
@@ -28,23 +26,23 @@ class User(SQLModel, table=True):
 class Visibility:
     """Options for visibility of an object."""
 
-    VISIBLE = 0
-    DELETED = 1
-    HIDDEN = 2
+    VISIBLE: int = 0
+    DELETED: int = 1
+    HIDDEN: int = 2
 
 
 # Type var used for building custom types for the DB
 T = TypeVar('T')
 
 
-def build_custom_type(internal_type: Type[T]) -> Type[AutoString]:
+def build_custom_type(internal_type: type[T]) -> type[AutoString]:
     """Create a type that is compatible with the database.
 
     Based on https://github.com/fastapi/sqlmodel/discussions/847
     """
 
     class CustomType(AutoString):
-        def process_bind_param(self, value, dialect) -> Optional[str]:
+        def process_bind_param(self, value, dialect) -> str | None:
             if value is None:
                 return None
 
@@ -57,7 +55,7 @@ def build_custom_type(internal_type: Type[T]) -> Type[AutoString]:
 
             return str(value)
 
-        def process_result_value(self, value, dialect) -> Optional[T]:
+        def process_result_value(self, value, dialect) -> T | None:
             if value is None:
                 return None
 
@@ -69,8 +67,6 @@ def build_custom_type(internal_type: Type[T]) -> Type[AutoString]:
 class Bookmark(SQLModel, table=True):
     """Bookmark object."""
 
-    __tablename__ = 'bookmark'
-
     id: int = Field(primary_key=True)
     user_key: str = Field(foreign_key='user.key', nullable=False)
     title: str = Field(default='', nullable=False)
@@ -93,7 +89,7 @@ class Bookmark(SQLModel, table=True):
 
     @computed_field
     @property
-    def tag_list(self) -> list:
+    def tag_list(self) -> list[str]:
         """The tags but as a proper list."""
         if self.tags:
             return self.tags.split(',')
@@ -104,8 +100,6 @@ class Bookmark(SQLModel, table=True):
 class PublicTag(SQLModel, table=True):
     """Public tag object."""
 
-    __tablename__ = 'publictag'
-
     id: int = Field(primary_key=True)
     tag_key: str
     user_key: str = Field(foreign_key='user.key')
diff --git a/src/digimarks/tags_service.py b/src/digimarks/tags_service.py
index a4cf8b8..5730689 100644
--- a/src/digimarks/tags_service.py
+++ b/src/digimarks/tags_service.py
@@ -53,7 +53,10 @@ def clean_tags(tags_list: list) -> list[str]:
 
 
 def list_tags_for_bookmarks(bookmarks: Sequence[Bookmark]) -> list[str]:
-    """Generate a unique list of the tags from the list of bookmarks."""
+    """Generate a unique list of the tags from the list of bookmarks.
+
+    :param Sequence[Bookmark] bookmarks: List of bookmarks to create the list of tags from
+    """
     tags = []
     for bookmark in bookmarks:
         tags += bookmark.tag_list