List all projects in your Todoist account.

Returns all projects including personal projects, shared projects, and sub-projects.
Use this to get project IDs for creating tasks in specific projects.

Args:
    params: ListProjectsInput containing:
        - response_format: 'markdown' or 'json'

Returns:
    List of projects with their IDs, names, and metadata.

Get details of a specific project.

Args:
    params: GetProjectInput containing:
        - project_id: The project ID
        - response_format: 'markdown' or 'json'

Returns:
    Project details including name, color, and metadata.

Create a new project in Todoist.

Args:
    params: CreateProjectInput containing:
        - name: Project name
        - parent_id: Optional parent project ID for sub-projects
        - color: Optional color name
        - is_favorite: Whether to mark as favorite

Returns:
    Created project details including the new project ID.

List tasks from Todoist with optional filters.

Supports filtering by project, label, or using Todoist's filter syntax.
Common filters: 'today', 'tomorrow', 'overdue', 'p1', 'p2', 'no due date',
'due before: tomorrow', '7 days', '@label_name', '#project_name'.

Args:
    params: ListTasksInput containing:
        - project_id: Filter by project
        - label: Filter by label name
        - filter: Todoist filter query
        - limit: Maximum tasks to return
        - response_format: 'markdown' or 'json'

Returns:
    List of tasks with their content, due dates, and priorities.

Get details of a specific task.

Args:
    params: GetTaskInput containing:
        - task_id: The task ID
        - response_format: 'markdown' or 'json'

Returns:
    Full task details including content, description, due date, and labels.

Create a new task in Todoist.

⚠️ TEMPORAL CHECK: Verify year in due_date matches current year from
system date. LLMs often default to training-data years (2023/2024).

Supports natural language due dates like 'tomorrow', 'next Monday', 'every week'.
Priority 4 is highest (red), priority 1 is lowest.

Args:
    params: CreateTaskInput containing:
        - content: Task title/content
        - description: Optional detailed description
        - project_id: Project to add to (defaults to Inbox)
        - due_string: Natural language due date
        - due_date: Due date in YYYY-MM-DD format
        - priority: 1-4 (4 is highest)
        - labels: List of label names
        - parent_id: Parent task ID for subtasks

Returns:
    Created task details including the new task ID.

Update an existing task in Todoist.

Only provided fields will be updated. To clear a due date, use the Todoist app.

Args:
    params: UpdateTaskInput containing:
        - task_id: The task ID to update
        - content: New task title
        - description: New description
        - due_string: New due date (natural language)
        - due_date: New due date (YYYY-MM-DD)
        - priority: New priority (1-4)
        - labels: New labels (replaces existing)

Returns:
    Updated task confirmation.

Mark a task as complete.

For recurring tasks, this will close the current occurrence and create the next one.

Args:
    params: CompleteTaskInput containing:
        - task_id: The task ID to complete

Returns:
    Confirmation that the task was completed.

Reopen a completed task.

Args:
    params: ReopenTaskInput containing:
        - task_id: The task ID to reopen

Returns:
    Confirmation that the task was reopened.

Permanently delete a task.

⚠️ This action cannot be undone. The task will be permanently removed.

Args:
    params: DeleteTaskInput containing:
        - task_id: The task ID to delete

Returns:
    Confirmation that the task was deleted.

List all personal labels in your Todoist account.

Labels can be applied to tasks for organization and filtering.

Args:
    params: ListLabelsInput containing:
        - response_format: 'markdown' or 'json'

Returns:
    List of labels with their names and colors.

Create a new label.

Labels help organize tasks across projects. Apply labels to tasks for easy filtering.

Args:
    params: CreateLabelInput containing:
        - name: Label name
        - color: Optional color name
        - is_favorite: Whether to mark as favorite

Returns:
    Created label details including the new label ID.