diff --git a/src/rtm_mcp/response_builder.py b/src/rtm_mcp/response_builder.py
index 3215406..1c632fe 100644
--- a/src/rtm_mcp/response_builder.py
+++ b/src/rtm_mcp/response_builder.py
@@ -198,27 +198,29 @@ def parse_tasks_response(result: dict[str, Any]) -> list[dict[str, Any]]:
                     notes = [notes]
 
             for t in task_data:
-                tasks.append({
-                    "id": t.get("id"),
-                    "taskseries_id": ts.get("id"),
-                    "list_id": list_id,
-                    "name": ts.get("name"),
-                    "due": t.get("due") or None,
-                    "has_due_time": t.get("has_due_time") == "1",
-                    "start": t.get("start") or None,
-                    "has_start_time": t.get("has_start_time") == "1",
-                    "completed": t.get("completed") or None,
-                    "deleted": t.get("deleted") or None,
-                    "priority": t.get("priority", "N"),
-                    "postponed": int(t.get("postponed", 0)),
-                    "estimate": t.get("estimate") or None,
-                    "tags": tags if tags else [],
-                    "notes": notes,
-                    "url": ts.get("url") or None,
-                    "location_id": ts.get("location_id") or None,
-                    "created": ts.get("created") or None,
-                    "modified": ts.get("modified") or None,
-                })
+                tasks.append(
+                    {
+                        "id": t.get("id"),
+                        "taskseries_id": ts.get("id"),
+                        "list_id": list_id,
+                        "name": ts.get("name"),
+                        "due": t.get("due") or None,
+                        "has_due_time": t.get("has_due_time") == "1",
+                        "start": t.get("start") or None,
+                        "has_start_time": t.get("has_start_time") == "1",
+                        "completed": t.get("completed") or None,
+                        "deleted": t.get("deleted") or None,
+                        "priority": t.get("priority", "N"),
+                        "postponed": int(t.get("postponed", 0)),
+                        "estimate": t.get("estimate") or None,
+                        "tags": tags if tags else [],
+                        "notes": notes,
+                        "url": ts.get("url") or None,
+                        "location_id": ts.get("location_id") or None,
+                        "created": ts.get("created") or None,
+                        "modified": ts.get("modified") or None,
+                    }
+                )
 
     return tasks
 
diff --git a/src/rtm_mcp/tools/notes.py b/src/rtm_mcp/tools/notes.py
index 31e941a..730e075 100644
--- a/src/rtm_mcp/tools/notes.py
+++ b/src/rtm_mcp/tools/notes.py
@@ -228,13 +228,15 @@ async def get_task_notes(
 
         formatted_notes = []
         for note in notes:
-            formatted_notes.append({
-                "id": note.get("id"),
-                "title": note.get("title", ""),
-                "body": note.get("$t", note.get("body", "")),
-                "created": note.get("created"),
-                "modified": note.get("modified"),
-            })
+            formatted_notes.append(
+                {
+                    "id": note.get("id"),
+                    "title": note.get("title", ""),
+                    "body": note.get("$t", note.get("body", "")),
+                    "created": note.get("created"),
+                    "modified": note.get("modified"),
+                }
+            )
 
         return build_response(
             data={
diff --git a/src/rtm_mcp/tools/tasks.py b/src/rtm_mcp/tools/tasks.py
index b0e1c40..53fe257 100644
--- a/src/rtm_mcp/tools/tasks.py
+++ b/src/rtm_mcp/tools/tasks.py
@@ -971,6 +971,7 @@ def _analyze_tasks(tasks: list[dict[str, Any]], timezone: str | None = None) ->
     without_estimate = 0
     tags_used: set[str] = set()
 
+    import contextlib
     from datetime import UTC, datetime
     from zoneinfo import ZoneInfo
 
@@ -978,15 +979,10 @@ def _analyze_tasks(tasks: list[dict[str, Any]], timezone: str | None = None) ->
     # RTM due dates are relative to the user's timezone
     user_tz = None
     if timezone:
-        try:
+        with contextlib.suppress(Exception):
             user_tz = ZoneInfo(timezone)
-        except Exception:
-            pass
 
-    if user_tz:
-        now = datetime.now(user_tz)
-    else:
-        now = datetime.now(UTC)
+    now = datetime.now(user_tz) if user_tz else datetime.now(UTC)
     today = now.date()
 
     for task in tasks:
diff --git a/src/rtm_mcp/tools/utilities.py b/src/rtm_mcp/tools/utilities.py
index da69f44..97680a0 100644
--- a/src/rtm_mcp/tools/utilities.py
+++ b/src/rtm_mcp/tools/utilities.py
@@ -104,9 +104,11 @@ async def get_tags(ctx: Context) -> dict[str, Any]:
             if isinstance(tag, str):
                 tags.append({"name": tag})
             else:
-                tags.append({
-                    "name": tag.get("name", tag.get("$t", "")),
-                })
+                tags.append(
+                    {
+                        "name": tag.get("name", tag.get("$t", "")),
+                    }
+                )
 
         return build_response(
             data={
@@ -134,14 +136,16 @@ async def get_locations(ctx: Context) -> dict[str, Any]:
 
         locations = []
         for loc in locations_data:
-            locations.append({
-                "id": loc.get("id"),
-                "name": loc.get("name"),
-                "latitude": float(loc.get("latitude", 0)),
-                "longitude": float(loc.get("longitude", 0)),
-                "zoom": int(loc.get("zoom", 0)) if loc.get("zoom") else None,
-                "address": loc.get("address"),
-            })
+            locations.append(
+                {
+                    "id": loc.get("id"),
+                    "name": loc.get("name"),
+                    "latitude": float(loc.get("latitude", 0)),
+                    "longitude": float(loc.get("longitude", 0)),
+                    "zoom": int(loc.get("zoom", 0)) if loc.get("zoom") else None,
+                    "address": loc.get("address"),
+                }
+            )
 
         return build_response(
             data={
@@ -166,7 +170,9 @@ async def get_settings(ctx: Context) -> dict[str, Any]:
         settings = result.get("settings", {})
 
         # Format settings nicely
-        date_format = "European (DD/MM/YY)" if settings.get("dateformat") == "0" else "American (MM/DD/YY)"
+        date_format = (
+            "European (DD/MM/YY)" if settings.get("dateformat") == "0" else "American (MM/DD/YY)"
+        )
         time_format = "12-hour" if settings.get("timeformat") == "0" else "24-hour"
 
         return build_response(
@@ -276,11 +282,13 @@ async def get_contacts(ctx: Context) -> dict[str, Any]:
 
         contacts = []
         for contact in contacts_data:
-            contacts.append({
-                "id": contact.get("id"),
-                "fullname": contact.get("fullname"),
-                "username": contact.get("username"),
-            })
+            contacts.append(
+                {
+                    "id": contact.get("id"),
+                    "fullname": contact.get("fullname"),
+                    "username": contact.get("username"),
+                }
+            )
 
         return build_response(
             data={
@@ -312,11 +320,13 @@ async def get_groups(ctx: Context) -> dict[str, Any]:
             if isinstance(contacts, dict):
                 contacts = [contacts]
 
-            groups.append({
-                "id": group.get("id"),
-                "name": group.get("name"),
-                "member_count": len(contacts),
-            })
+            groups.append(
+                {
+                    "id": group.get("id"),
+                    "name": group.get("name"),
+                    "member_count": len(contacts),
+                }
+            )
 
         return build_response(
             data={
diff --git a/tests/test_tools/test_tasks.py b/tests/test_tools/test_tasks.py
index 7a82111..2434e21 100644
--- a/tests/test_tools/test_tasks.py
+++ b/tests/test_tools/test_tasks.py
@@ -47,7 +47,7 @@ def test_analyze_overdue_tasks(self) -> None:
 
     def test_analyze_tasks_with_timezone(self) -> None:
         """Test that timezone is properly applied for date comparisons."""
-        from datetime import UTC, datetime, timedelta
+        from datetime import UTC, datetime
         from zoneinfo import ZoneInfo
 
         from rtm_mcp.tools.tasks import _analyze_tasks