diff --git a/application/agents/tools/todo_list.py b/application/agents/tools/todo_list.py
new file mode 100644
index 00000000..87a3e969
--- /dev/null
+++ b/application/agents/tools/todo_list.py
@@ -0,0 +1,321 @@
+from datetime import datetime
+from typing import Any, Dict, List, Optional
+import uuid
+
+from .base import Tool
+from application.core.mongo_db import MongoDB
+from application.core.settings import settings
+
+
+class TodoListTool(Tool):
+    """Todo List
+
+    Manages todo items for users. Supports creating, viewing, updating, and deleting todos.
+    """
+
+    def __init__(self, tool_config: Optional[Dict[str, Any]] = None, user_id: Optional[str] = None) -> None:
+        """Initialize the tool.
+
+        Args:
+            tool_config: Optional tool configuration. Should include:
+                - tool_id: Unique identifier for this todo list tool instance (from user_tools._id)
+                           This ensures each user's tool configuration has isolated todos
+            user_id: The authenticated user's id (should come from decoded_token["sub"]).
+        """
+        self.user_id: Optional[str] = user_id
+
+        # Get tool_id from configuration (passed from user_tools._id in production)
+        # In production, tool_id is the MongoDB ObjectId string from user_tools collection
+        if tool_config and "tool_id" in tool_config:
+            self.tool_id = tool_config["tool_id"]
+        elif user_id:
+            # Fallback for backward compatibility or testing
+            self.tool_id = f"default_{user_id}"
+        else:
+            # Last resort fallback (shouldn't happen in normal use)
+            self.tool_id = str(uuid.uuid4())
+
+        db = MongoDB.get_client()[settings.MONGO_DB_NAME]
+        self.collection = db["todos"]
+
+    # -----------------------------
+    # Action implementations
+    # -----------------------------
+    def execute_action(self, action_name: str, **kwargs: Any) -> str:
+        """Execute an action by name.
+
+        Args:
+            action_name: One of list, create, get, update, complete, delete.
+            **kwargs: Parameters for the action.
+
+        Returns:
+            A human-readable string result.
+        """
+        if not self.user_id:
+            return "Error: TodoListTool requires a valid user_id."
+
+        if action_name == "list":
+            return self._list()
+
+        if action_name == "create":
+            return self._create(kwargs.get("title", ""))
+
+        if action_name == "get":
+            return self._get(kwargs.get("todo_id"))
+
+        if action_name == "update":
+            return self._update(
+                kwargs.get("todo_id"),
+                kwargs.get("title", "")
+            )
+
+        if action_name == "complete":
+            return self._complete(kwargs.get("todo_id"))
+
+        if action_name == "delete":
+            return self._delete(kwargs.get("todo_id"))
+
+        return f"Unknown action: {action_name}"
+
+    def get_actions_metadata(self) -> List[Dict[str, Any]]:
+        """Return JSON metadata describing supported actions for tool schemas."""
+        return [
+            {
+                "name": "list",
+                "description": "List all todos for the user.",
+                "parameters": {"type": "object", "properties": {}},
+            },
+            {
+                "name": "create",
+                "description": "Create a new todo item.",
+                "parameters": {
+                    "type": "object",
+                    "properties": {
+                        "title": {
+                            "type": "string",
+                            "description": "Title of the todo item."
+                        }
+                    },
+                    "required": ["title"],
+                },
+            },
+            {
+                "name": "get",
+                "description": "Get a specific todo by ID.",
+                "parameters": {
+                    "type": "object",
+                    "properties": {
+                        "todo_id": {
+                            "type": "integer",
+                            "description": "The ID of the todo to retrieve."
+                        }
+                    },
+                    "required": ["todo_id"],
+                },
+            },
+            {
+                "name": "update",
+                "description": "Update a todo's title by ID.",
+                "parameters": {
+                    "type": "object",
+                    "properties": {
+                        "todo_id": {
+                            "type": "integer",
+                            "description": "The ID of the todo to update."
+                        },
+                        "title": {
+                            "type": "string",
+                            "description": "The new title for the todo."
+                        }
+                    },
+                    "required": ["todo_id", "title"],
+                },
+            },
+            {
+                "name": "complete",
+                "description": "Mark a todo as completed.",
+                "parameters": {
+                    "type": "object",
+                    "properties": {
+                        "todo_id": {
+                            "type": "integer",
+                            "description": "The ID of the todo to mark as completed."
+                        }
+                    },
+                    "required": ["todo_id"],
+                },
+            },
+            {
+                "name": "delete",
+                "description": "Delete a specific todo by ID.",
+                "parameters": {
+                    "type": "object",
+                    "properties": {
+                        "todo_id": {
+                            "type": "integer",
+                            "description": "The ID of the todo to delete."
+                        }
+                    },
+                    "required": ["todo_id"],
+                },
+            },
+        ]
+
+    def get_config_requirements(self) -> Dict[str, Any]:
+        """Return configuration requirements."""
+        return {}
+
+    # -----------------------------
+    # Internal helpers
+    # -----------------------------
+    def _coerce_todo_id(self, value: Optional[Any]) -> Optional[int]:
+        """Convert todo identifiers to sequential integers."""
+        if value is None:
+            return None
+
+        if isinstance(value, int):
+            return value if value > 0 else None
+
+        if isinstance(value, str):
+            stripped = value.strip()
+            if stripped.isdigit():
+                numeric_value = int(stripped)
+                return numeric_value if numeric_value > 0 else None
+
+        return None
+
+    def _get_next_todo_id(self) -> int:
+        """Get the next sequential todo_id for this user and tool.
+
+        Returns a simple integer (1, 2, 3, ...) scoped to this user/tool.
+        With 5-10 todos max, scanning is negligible.
+        """
+        # Find all todos for this user/tool and get their IDs
+        todos = list(self.collection.find(
+            {"user_id": self.user_id, "tool_id": self.tool_id},
+            {"todo_id": 1}
+        ))
+
+        # Find the maximum todo_id
+        max_id = 0
+        for todo in todos:
+            todo_id = self._coerce_todo_id(todo.get("todo_id"))
+            if todo_id is not None:
+                max_id = max(max_id, todo_id)
+
+        return max_id + 1
+
+    def _list(self) -> str:
+        """List all todos for the user."""
+        cursor = self.collection.find({"user_id": self.user_id, "tool_id": self.tool_id})
+        todos = list(cursor)
+
+        if not todos:
+            return "No todos found."
+
+        result_lines = ["Todos:"]
+        for doc in todos:
+            todo_id = doc.get("todo_id")
+            title = doc.get("title", "Untitled")
+            status = doc.get("status", "open")
+
+            line = f"[{todo_id}] {title} ({status})"
+            result_lines.append(line)
+
+        return "\n".join(result_lines)
+
+    def _create(self, title: str) -> str:
+        """Create a new todo item."""
+        title = (title or "").strip()
+        if not title:
+            return "Error: Title is required."
+
+        now = datetime.now()
+        todo_id = self._get_next_todo_id()
+
+        doc = {
+            "todo_id": todo_id,
+            "user_id": self.user_id,
+            "tool_id": self.tool_id,
+            "title": title,
+            "status": "open",
+            "created_at": now,
+            "updated_at": now,
+        }
+        self.collection.insert_one(doc)
+        return f"Todo created with ID {todo_id}: {title}"
+
+    def _get(self, todo_id: Optional[Any]) -> str:
+        """Get a specific todo by ID."""
+        parsed_todo_id = self._coerce_todo_id(todo_id)
+        if parsed_todo_id is None:
+            return "Error: todo_id must be a positive integer."
+
+        doc = self.collection.find_one({
+            "user_id": self.user_id,
+            "tool_id": self.tool_id,
+            "todo_id": parsed_todo_id
+        })
+
+        if not doc:
+            return f"Error: Todo with ID {parsed_todo_id} not found."
+
+        title = doc.get("title", "Untitled")
+        status = doc.get("status", "open")
+
+        result = f"Todo [{parsed_todo_id}]:\nTitle: {title}\nStatus: {status}"
+
+        return result
+
+    def _update(self, todo_id: Optional[Any], title: str) -> str:
+        """Update a todo's title by ID."""
+        parsed_todo_id = self._coerce_todo_id(todo_id)
+        if parsed_todo_id is None:
+            return "Error: todo_id must be a positive integer."
+
+        title = (title or "").strip()
+        if not title:
+            return "Error: Title is required."
+
+        result = self.collection.update_one(
+            {"user_id": self.user_id, "tool_id": self.tool_id, "todo_id": parsed_todo_id},
+            {"$set": {"title": title, "updated_at": datetime.now()}}
+        )
+
+        if result.matched_count == 0:
+            return f"Error: Todo with ID {parsed_todo_id} not found."
+
+        return f"Todo {parsed_todo_id} updated to: {title}"
+
+    def _complete(self, todo_id: Optional[Any]) -> str:
+        """Mark a todo as completed."""
+        parsed_todo_id = self._coerce_todo_id(todo_id)
+        if parsed_todo_id is None:
+            return "Error: todo_id must be a positive integer."
+
+        result = self.collection.update_one(
+            {"user_id": self.user_id, "tool_id": self.tool_id, "todo_id": parsed_todo_id},
+            {"$set": {"status": "completed", "updated_at": datetime.now()}}
+        )
+
+        if result.matched_count == 0:
+            return f"Error: Todo with ID {parsed_todo_id} not found."
+
+        return f"Todo {parsed_todo_id} marked as completed."
+
+    def _delete(self, todo_id: Optional[Any]) -> str:
+        """Delete a specific todo by ID."""
+        parsed_todo_id = self._coerce_todo_id(todo_id)
+        if parsed_todo_id is None:
+            return "Error: todo_id must be a positive integer."
+
+        result = self.collection.delete_one({
+            "user_id": self.user_id,
+            "tool_id": self.tool_id,
+            "todo_id": parsed_todo_id
+        })
+
+        if result.deleted_count == 0:
+            return f"Error: Todo with ID {parsed_todo_id} not found."
+
+        return f"Todo {parsed_todo_id} deleted."
diff --git a/application/agents/tools/tool_manager.py b/application/agents/tools/tool_manager.py
index fb45b987..855f1b53 100644
--- a/application/agents/tools/tool_manager.py
+++ b/application/agents/tools/tool_manager.py
@@ -28,7 +28,7 @@ class ToolManager:
         module = importlib.import_module(f"application.agents.tools.{tool_name}")
         for member_name, obj in inspect.getmembers(module, inspect.isclass):
             if issubclass(obj, Tool) and obj is not Tool:
-                if tool_name in {"mcp_tool", "notes", "memory"} and user_id:
+                if tool_name in {"mcp_tool", "notes", "memory", "todo_list"} and user_id:
                     return obj(tool_config, user_id)
                 else:
                     return obj(tool_config)
@@ -36,7 +36,7 @@ class ToolManager:
     def execute_action(self, tool_name, action_name, user_id=None, **kwargs):
         if tool_name not in self.tools:
             raise ValueError(f"Tool '{tool_name}' not loaded")
-        if tool_name in {"mcp_tool", "memory"} and user_id:
+        if tool_name in {"mcp_tool", "memory", "todo_list"} and user_id:
             tool_config = self.config.get(tool_name, {})
             tool = self.load_tool(tool_name, tool_config, user_id)
             return tool.execute_action(action_name, **kwargs)
diff --git a/frontend/public/toolIcons/tool_todo_list.svg b/frontend/public/toolIcons/tool_todo_list.svg
new file mode 100644
index 00000000..3eb8ef24
--- /dev/null
+++ b/frontend/public/toolIcons/tool_todo_list.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#e3e3e3"><path d="M240-80q-33 0-56.5-23.5T160-160v-640q0-33 23.5-56.5T240-880h480q33 0 56.5 23.5T800-800v640q0 33-23.5 56.5T720-80H240Zm0-80h480v-640H240v640Zm88-104 56-56-56-56-56 56 56 56Zm0-160 56-56-56-56-56 56 56 56Zm0-160 56-56-56-56-56 56 56 56Zm120 280h232v-80H448v80Zm0-160h232v-80H448v80Zm0-160h232v-80H448v80ZM240-160v-640 640Z"/></svg>
diff --git a/tests/test_todo_tool.py b/tests/test_todo_tool.py
new file mode 100644
index 00000000..a193e8ee
--- /dev/null
+++ b/tests/test_todo_tool.py
@@ -0,0 +1,156 @@
+import pytest
+from application.agents.tools.todo_list import TodoListTool
+from application.core.settings import settings
+
+
+class FakeCursor(list):
+    def sort(self, key, direction):
+        reverse = direction == -1
+        sorted_list = sorted(self, key=lambda d: d.get(key, 0), reverse=reverse)
+        return FakeCursor(sorted_list)
+
+    def limit(self, count):
+        return FakeCursor(self[:count])
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        if not self:
+            raise StopIteration
+        return self.pop(0)
+
+
+class FakeCollection:
+    def __init__(self):
+        self.docs = {}
+
+    def create_index(self, *args, **kwargs):
+        pass
+
+    def insert_one(self, doc):
+        key = (doc["user_id"], doc["tool_id"], int(doc["todo_id"]))
+        self.docs[key] = doc
+        return type("res", (), {"inserted_id": key})
+
+    def find_one(self, query):
+        key = (query.get("user_id"), query.get("tool_id"), int(query.get("todo_id")))
+        return self.docs.get(key)
+
+    def find(self, query):
+        user_id = query.get("user_id")
+        tool_id = query.get("tool_id")
+        filtered = [
+            doc for (uid, tid, _), doc in self.docs.items()
+            if uid == user_id and tid == tool_id
+        ]
+        return FakeCursor(filtered)
+
+    def update_one(self, query, update, upsert=False):
+        key = (query.get("user_id"), query.get("tool_id"), int(query.get("todo_id")))
+        if key in self.docs:
+            self.docs[key].update(update.get("$set", {}))
+            return type("res", (), {"matched_count": 1})
+        elif upsert:
+            new_doc = {**query, **update.get("$set", {})}
+            self.docs[key] = new_doc
+            return type("res", (), {"matched_count": 1})
+        else:
+            return type("res", (), {"matched_count": 0})
+
+    def delete_one(self, query):
+        key = (query.get("user_id"), query.get("tool_id"), int(query.get("todo_id")))
+        if key in self.docs:
+            del self.docs[key]
+            return type("res", (), {"deleted_count": 1})
+        return type("res", (), {"deleted_count": 0})
+
+
+@pytest.fixture
+def todo_tool(monkeypatch) -> TodoListTool:
+    """Provides a TodoListTool with a fake MongoDB backend."""
+    fake_collection = FakeCollection()
+    fake_client = {settings.MONGO_DB_NAME: {"todos": fake_collection}}
+    monkeypatch.setattr("application.core.mongo_db.MongoDB.get_client", lambda: fake_client)
+    return TodoListTool({"tool_id": "test_tool"}, user_id="test_user")
+
+
+def test_create_and_get(todo_tool: TodoListTool):
+    res = todo_tool.execute_action("todo_create", title="Write tests", description="Write pytest cases")
+    assert res["status_code"] == 201
+    todo_id = res["todo_id"]
+
+    get_res = todo_tool.execute_action("todo_get", todo_id=todo_id)
+    assert get_res["status_code"] == 200
+    assert get_res["todo"]["title"] == "Write tests"
+    assert get_res["todo"]["description"] == "Write pytest cases"
+
+
+def test_get_all_todos(todo_tool: TodoListTool):
+    todo_tool.execute_action("todo_create", title="Task 1")
+    todo_tool.execute_action("todo_create", title="Task 2")
+
+    list_res = todo_tool.execute_action("todo_list")
+    assert list_res["status_code"] == 200
+    titles = [todo["title"] for todo in list_res["todos"]]
+    assert "Task 1" in titles
+    assert "Task 2" in titles
+
+
+def test_update_todo(todo_tool: TodoListTool):
+    create_res = todo_tool.execute_action("todo_create", title="Initial Title")
+    todo_id = create_res["todo_id"]
+
+    update_res = todo_tool.execute_action("todo_update", todo_id=todo_id, updates={"title": "Updated Title", "status": "done"})
+    assert update_res["status_code"] == 200
+
+    get_res = todo_tool.execute_action("todo_get", todo_id=todo_id)
+    assert get_res["todo"]["title"] == "Updated Title"
+    assert get_res["todo"]["status"] == "done"
+
+
+def test_delete_todo(todo_tool: TodoListTool):
+    create_res = todo_tool.execute_action("todo_create", title="To Delete")
+    todo_id = create_res["todo_id"]
+
+    delete_res = todo_tool.execute_action("todo_delete", todo_id=todo_id)
+    assert delete_res["status_code"] == 200
+
+    get_res = todo_tool.execute_action("todo_get", todo_id=todo_id)
+    assert get_res["status_code"] == 404
+
+
+def test_isolation_and_default_tool_id(monkeypatch):
+    """Ensure todos are isolated by tool_id and user_id."""
+    fake_collection = FakeCollection()
+    fake_client = {settings.MONGO_DB_NAME: {"todos": fake_collection}}
+    monkeypatch.setattr("application.core.mongo_db.MongoDB.get_client", lambda: fake_client)
+
+    # Same user, different tool_id
+    tool1 = TodoListTool({"tool_id": "tool_1"}, user_id="u1")
+    tool2 = TodoListTool({"tool_id": "tool_2"}, user_id="u1")
+
+    r1_create = tool1.execute_action("todo_create", title="from tool 1")
+    r2_create = tool2.execute_action("todo_create", title="from tool 2")
+
+    r1 = tool1.execute_action("todo_get", todo_id=r1_create["todo_id"])
+    r2 = tool2.execute_action("todo_get", todo_id=r2_create["todo_id"])
+
+    assert r1["status_code"] == 200
+    assert r1["todo"]["title"] == "from tool 1"
+
+    assert r2["status_code"] == 200
+    assert r2["todo"]["title"] == "from tool 2"
+
+    # Same user, no tool_id → should default to same value
+    t3 = TodoListTool({}, user_id="default_user")
+    t4 = TodoListTool({}, user_id="default_user")
+
+    assert t3.tool_id == "default_default_user"
+    assert t4.tool_id == "default_default_user"
+
+    create_res = t3.execute_action("todo_create", title="shared default")
+    r = t4.execute_action("todo_get", todo_id=create_res["todo_id"])
+
+    assert r["status_code"] == 200
+    assert r["todo"]["title"] == "shared default"