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shayonpal

mcp-todoist

by shayonpal

Todoist MCP Server

npm version License: GPL-3.0 Node.js Version

MCP server enabling programmatic Todoist task and project management through an optimized tool set using Todoist REST API v1. Integrates seamlessly with Claude Desktop and other MCP-compatible clients.

Table of Contents

Related MCP server: Todoist MCP Server

Features

  • 8 Core Tools: Comprehensive task and project management

    • Tasks (CRUD + complete/uncomplete)

    • Bulk Tasks (batch operations on up to 50 tasks)

    • Projects (CRUD + archive/unarchive)

    • Sections (organize tasks within projects)

    • Comments (with file attachment support)

    • Filters (custom task queries)

    • Reminders (relative, absolute, location-based)

    • Labels (personal and shared label management)

  • Natural Language Dates: "tomorrow", "every Monday", "next Friday at 3pm"

  • Deadline Support: Set completion deadlines distinct from due dates

  • Batch Operations: Execute up to 100 operations per request via Sync API

  • Smart Rate Limiting: Token bucket algorithm with automatic retry

  • Type Safety: Full TypeScript implementation with Zod validation

  • Comprehensive Testing: Contract and integration test coverage

Prerequisites

Installation

This MCP server is deployed as a remote HTTP service. No local installation required - just configure your MCP client to connect to the HTTP endpoint.

For Deployment

If you want to deploy your own instance:

  1. Fork this repository

  2. Deploy to Vercel (button below)

  3. Configure TODOIST_API_TOKEN in Vercel environment variables

Deploy with Vercel

Configuration

MCP Clients

Configure your MCP client with the HTTP transport:

Claude Desktop / Claude Code

Add to your MCP settings file:

macOS: ~/.claude/settings.json Windows: %APPDATA%\.claude\settings.json Linux: ~/.config/claude/settings.json

{
  "mcpServers": {
    "todoist": {
      "transport": {
        "type": "http",
        "url": "https://todoist.uberfolks.ca/mcp"
      }
    }
  }
}

For local development:

{
  "mcpServers": {
    "todoist": {
      "transport": {
        "type": "http",
        "url": "http://localhost:3000/mcp"
      }
    }
  }
}

Available Tools

todoist_tasks

Complete task management with create, get, update, delete, list, complete, uncomplete, and list_completed actions. Supports natural language dates, deadlines, priorities, labels, recurring tasks, and querying completed tasks within time-bounded windows.

Key parameters: action, task_id, content, due_date, due_string, deadline, priority, labels, project_id, completed_query_type, since, until

Completed tasks querying:

  • list_completed action retrieves completed tasks

  • Query by completion date (3-month window) or due date (6-week window)

  • Supports filtering by project, section, workspace, labels, and more

  • Cursor-based pagination for large result sets

  • Example: Query all tasks completed in September with Work label

    {
      "action": "list_completed",
      "completed_query_type": "by_completion_date",
      "since": "2025-09-01T00:00:00Z",
      "until": "2025-09-30T23:59:59Z",
      "filter_query": "@Work",
      "limit": 50
    }

todoist_projects

Project management with create, get, update, delete, list, archive, and unarchive actions. Organize work with hierarchical projects and custom views.

Key parameters: action, project_id, name, color, is_favorite, view_style

todoist_sections

Section management within projects for better task organization. Create, get, update, delete, list, and reorder sections.

Key parameters: action, section_id, project_id, name, order

todoist_comments

Add and manage comments on tasks and projects with file attachment support (up to 15,000 characters).

Key parameters: action, comment_id, task_id, project_id, content, attachment

todoist_filters

Create and manage custom filters for advanced task queries. List, create, update, delete, and query filters.

Key parameters: action, filter_id, name, query, color, is_favorite

todoist_reminders

Set reminders for tasks with three types: relative (X minutes before due), absolute (specific datetime), and location-based (geofenced).

Key parameters: action, reminder_id, item_id, type, minute_offset, due, loc_lat, loc_long

todoist_labels

Manage personal and shared labels with create, get, update, delete, list, rename, and remove actions. Includes caching for optimal performance.

Key parameters: action, label_id, name, color, is_favorite, order

todoist_bulk_tasks

Perform bulk operations on up to 50 tasks simultaneously. Supports update, complete, uncomplete, and move operations with automatic deduplication and partial execution mode.

Key parameters: action, task_ids (1-50 items), project_id, section_id, labels, priority, due_string, deadline_date

Supported Actions:

  • update - Modify task fields (due date, priority, labels, etc.)

  • complete - Mark multiple tasks as done

  • uncomplete - Reopen completed tasks

  • move - Change project/section/parent for multiple tasks

Usage Examples:

// Bulk update due dates for 5 tasks
{
  "action": "update",
  "task_ids": ["7654321", "7654322", "7654323", "7654324", "7654325"],
  "due_string": "tomorrow"
}

// Bulk complete 10 tasks
{
  "action": "complete",
  "task_ids": ["7654321", "7654322", "7654323", "7654324", "7654325",
               "7654326", "7654327", "7654328", "7654329", "7654330"]
}

// Bulk move 7 tasks to different project
{
  "action": "move",
  "task_ids": ["7654321", "7654322", "7654323", "7654324", "7654325",
               "7654326", "7654327"],
  "project_id": "2203306141"
}

// Bulk update multiple fields for 8 tasks
{
  "action": "update",
  "task_ids": ["7654321", "7654322", "7654323", "7654324",
               "7654325", "7654326", "7654327", "7654328"],
  "priority": 2,
  "labels": ["urgent", "work"],
  "deadline_date": "2025-12-31"
}

Limitations:

  • Maximum 50 unique tasks per operation (after deduplication)

  • Cannot modify content (task title), description, or comments in bulk

  • All tasks receive the same field updates

  • Performance: <2 seconds for 50-task operations

Response Structure:

  • Individual results for each task (success/failure)

  • Summary counts (total, successful, failed)

  • Automatic deduplication metadata

  • Execution time tracking

Rate Limiting

The server implements intelligent rate limiting to respect Todoist API constraints:

  • REST API: 300 requests/minute (token bucket: 300 capacity, 5 tokens/sec refill)

  • Sync API: 50 requests/minute (token bucket: 50 capacity, ~0.83 tokens/sec refill)

  • Automatic Retry: Exponential backoff on 429 responses

  • Batch Operations: Use for bulk updates to minimize API calls

Development

Prerequisites

  • Node.js 18+

  • Vercel CLI: npm install -g vercel

  • Todoist API token

Local Setup

  1. Clone the repository:

    git clone https://github.com/shayonpal/mcp-todoist.git
    cd mcp-todoist
  2. Install dependencies:

    npm install
  3. Create .env.local:

    echo "TODOIST_API_TOKEN=your_token_here" > .env.local
  4. Start development server:

    vercel dev

    Server runs at http://localhost:3000/mcp

  5. Test endpoint:

    curl -X POST http://localhost:3000/mcp \
      -H "Content-Type: application/json" \
      -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Building

npm run build

Testing

npm test

Contributing

Contributions are welcome! Please see CONTRIBUTING.md for guidelines.

License

GNU General Public License v3.0 - see LICENSE for details.

Copyright (C) 2025 Shayon Pal

Available Tools

7 tools
todoist_commentsB

Comment management for Todoist tasks and projects - create, read, update, delete comments with 15,000 character limit and file attachment support

ParametersJSON Schema
NameRequiredDescriptionDefault
actionYesAction to perform
attachmentNoFile attachment
comment_idNoComment ID (required for get/update/delete)
contentNoComment content (max 15,000 characters)
project_idNoProject ID (for create/list_by_project)
task_idNoTask ID (for create/list_by_task)

TDQS

B3.2/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries full burden for behavioral disclosure. It adds valuable context about the 15,000 character limit and file attachment support, which aren't in the schema. However, it doesn't mention authentication requirements, rate limits, error conditions, or what happens when operations fail - significant gaps for a CRUD tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is efficiently structured in a single sentence that front-loads the core purpose and key constraints. Every element (comment management, CRUD operations, character limit, attachment support) earns its place. It could be slightly more structured by separating constraints from purpose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a CRUD tool with 6 parameters, no annotations, and no output schema, the description is moderately complete. It covers the scope and key constraints but lacks important context about authentication, error handling, response format, and when to use versus alternatives. The 100% schema coverage helps, but behavioral aspects are underspecified.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents all 6 parameters thoroughly. The description adds marginal value by mentioning the 15,000 character limit (implied for content parameter) and file attachment support (implied for attachment parameter). This meets the baseline for high schema coverage.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose as 'Comment management for Todoist tasks and projects' with specific verbs 'create, read, update, delete comments'. It distinguishes from siblings by focusing on comments rather than filters, labels, projects, etc. However, it doesn't explicitly differentiate from potential comment-related tools that might exist.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention when to use todoist_comments versus other comment-related approaches, nor does it provide context about prerequisites or typical use cases. The agent must infer usage from the action parameter alone.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

todoist_filtersC

Filter management and task querying for Todoist - query existing filters, retrieve tasks within filters, and manage saved filter criteria

ParametersJSON Schema
NameRequiredDescriptionDefault
actionYesAction to perform
colorNoFilter color
filter_idNoFilter ID (required for get_filter/query_filter/update_filter/delete_filter)
is_favoriteNoMark as favorite
langNoLanguage code for query parsing
nameNoFilter name
orderNoFilter order
queryNoFilter query (Todoist query syntax)

TDQS

C2.9/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions management and querying but fails to detail critical behaviors like authentication needs, rate limits, error handling, or what 'manage saved filter criteria' entails operationally. The description is too vague to inform the agent about how the tool behaves beyond basic intent.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence that front-loads the core purpose. It avoids unnecessary words, though it could be slightly more structured by separating querying from management aspects. Every phrase contributes to the tool's scope.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity (8 parameters, multiple actions) and lack of annotations and output schema, the description is insufficient. It doesn't explain return values, error conditions, or behavioral nuances needed for safe and effective use, leaving significant gaps in context.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents all 8 parameters thoroughly. The description adds no specific parameter semantics beyond implying that actions involve filters and tasks, which is redundant with the schema. Baseline 3 is appropriate as the schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose as 'Filter management and task querying for Todoist' with specific verbs (query, retrieve, manage) and resources (filters, tasks, criteria). It distinguishes this from sibling tools like todoist_tasks or todoist_projects by focusing on filters, though it doesn't explicitly contrast with them.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives like todoist_tasks for direct task operations or other siblings. It mentions general capabilities but lacks explicit when/when-not scenarios or prerequisites for specific actions.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

todoist_labelsC

label management for Todoist - create, read, update, delete labels with full CRUD operations

ParametersJSON Schema
NameRequiredDescriptionDefault
actionYesAction to perform on labels
colorNoPredefined color ID
cursorNoPagination cursor (for list action)
is_favoriteNoMark as favorite
label_idNoLabel ID (required for get, update, delete)
limitNoPage size (for list action, default 50, max 200)
nameNoLabel name (required for create, rename_shared)
new_nameNoNew label name (required for rename_shared)
orderNoDisplay order

TDQS

C2.9/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions 'full CRUD operations' but does not detail permissions required, rate limits, side effects (e.g., what happens on delete), or response formats. This is inadequate for a mutation tool with multiple actions, leaving significant gaps in understanding its behavior.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence that front-loads the core purpose ('label management for Todoist') and lists key operations. It avoids redundancy and waste, though it could be slightly more structured by explicitly mentioning the action parameter's role.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity (9 parameters, multiple mutation actions) and lack of annotations and output schema, the description is incomplete. It does not address behavioral aspects like permissions, error handling, or return values, which are crucial for safe and effective use in a CRUD context.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents all 9 parameters thoroughly, including descriptions and constraints (e.g., 'limit' with default 50, max 200). The description adds no additional parameter semantics beyond implying CRUD actions, which aligns with the 'action' enum. Baseline 3 is appropriate as the schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose as 'label management for Todoist' with 'create, read, update, delete labels with full CRUD operations,' which specifies the verb (manage) and resource (Todoist labels) and indicates comprehensive functionality. However, it does not explicitly differentiate from sibling tools like todoist_filters or todoist_projects, which handle different Todoist resources.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives, such as sibling tools like todoist_filters or todoist_projects, or within the tool itself for different actions (e.g., when to use 'create' vs 'list'). It lacks context on prerequisites, exclusions, or specific scenarios for usage.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

todoist_projectsC

Complete project management for Todoist - create, read, update, archive, and query projects with metadata support

ParametersJSON Schema
NameRequiredDescriptionDefault
actionYesAction to perform
colorNoProject color
include_archivedNoInclude archived projects (for list)
is_favoriteNoMark as favorite
nameNoProject name
parent_idNoParent project ID
project_idNoProject ID (required for get/update/delete/archive/unarchive)
view_styleNoView style

TDQS

C2.9/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries full burden but offers minimal behavioral insight. It mentions 'archive' as an action but doesn't clarify if deletion is permanent, what permissions are required, rate limits, or response formats. For a multi-action tool with 8 parameters, this leaves significant gaps in understanding tool behavior.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is efficiently structured in a single sentence that front-loads the core purpose. Every element earns its place, though it could be slightly more specific about scope. No wasted words or redundancy.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a complex multi-action tool with 8 parameters, no annotations, and no output schema, the description is insufficient. It doesn't explain how different actions work, what responses look like, error conditions, or prerequisites. The agent would struggle to use this effectively without trial and error.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents all parameters thoroughly. The description adds no specific parameter information beyond implying 'metadata support' might relate to color, favorite status, etc. Baseline 3 is appropriate when schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose as 'Complete project management for Todoist' with specific verbs (create, read, update, archive, query) and resource (projects). It distinguishes from siblings like todoist_tasks or todoist_labels by focusing on projects, though it doesn't explicitly contrast with them.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives like todoist_tasks for task management or todoist_sections for section operations. It mentions 'metadata support' but doesn't explain when that's relevant or when other tools might be more appropriate.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

todoist_remindersA

Manage reminders for Todoist tasks. Supports three reminder types: relative (minutes before task due date), absolute (specific date and time), and location (geofenced area). Natural language due dates supported (e.g., "tomorrow at 10:00", "every day", "every 4th").

ParametersJSON Schema
NameRequiredDescriptionDefault
actionYesAction to perform on reminders
dueNoDue date object for absolute reminders (supports natural language)
item_idNoTask ID for which the reminder is set
loc_latNoLatitude (location reminders only)
loc_longNoLongitude (location reminders only)
loc_triggerNoTrigger type for location reminders
minute_offsetNoMinutes before task due date (relative reminders only, max 43200 = 30 days)
nameNoLocation name (location reminders only)
notify_uidNoUser ID to notify (optional)
radiusNoRadius in meters (location reminders only, max 5000)
reminder_idNoReminder ID for get/update/delete operations
typeNoType of reminder: relative (minutes before due), absolute (specific datetime), location (geofenced)

TDQS

A3.5/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions the three reminder types and natural language support, but doesn't describe permissions needed, rate limits, error handling, or what happens on create/update/delete operations. For a tool with 12 parameters and no annotations, this leaves significant behavioral gaps.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is appropriately sized and front-loaded: the first sentence states the core purpose, and the second sentence efficiently lists key features (reminder types and natural language support). Every sentence earns its place with no wasted words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity (12 parameters, nested objects, no output schema, and no annotations), the description is incomplete. It covers the purpose and basic features but lacks details on behavioral aspects like authentication, side effects, or response format. It's adequate as a high-level overview but insufficient for full operational understanding.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents all parameters thoroughly. The description adds minimal value by mentioning the three reminder types (relative, absolute, location) and natural language due dates, which are already covered in the schema's 'type' and 'due' descriptions. Baseline 3 is appropriate when schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose: 'Manage reminders for Todoist tasks' with specific verb ('manage') and resource ('reminders for Todoist tasks'). It distinguishes from sibling tools (e.g., todoist_tasks, todoist_projects) by focusing exclusively on reminders, not tasks, projects, or other entities.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage by mentioning the three reminder types (relative, absolute, location) and natural language support, but it doesn't explicitly state when to use this tool versus alternatives like todoist_tasks for task management or provide any exclusions. It offers some context but lacks explicit guidance on tool selection.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

todoist_sectionsC

Section management within Todoist projects - create, read, update, delete, and reorder sections for better task organization

ParametersJSON Schema
NameRequiredDescriptionDefault
actionYesAction to perform
nameNoSection name
orderNoSection order
project_idNoProject ID (required for create/list/reorder)
section_idNoSection ID (required for get/update/delete)
section_ordersNoSection reordering array (for reorder action)

TDQS

C2.9/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries full burden for behavioral disclosure. While it mentions the six available actions, it doesn't describe what happens during each operation (e.g., whether deletions are permanent, if updates require specific permissions, what 'reorder' actually does to existing sections, or what the tool returns). For a multi-action tool with no annotation coverage, this leaves significant behavioral gaps.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is appropriately concise with a single sentence that efficiently communicates the scope and available actions. It's front-loaded with the core purpose ('Section management within Todoist projects') followed by the specific operations. No wasted words, though it could benefit from more structured guidance.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a 6-parameter tool with no annotations and no output schema, the description is incomplete. It doesn't address what the tool returns for different actions, error conditions, authentication requirements, or rate limits. The agent must rely entirely on the input schema without understanding the behavioral outcomes or constraints of this multi-action management tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema description coverage is 100%, so all parameters are documented in the schema itself. The description adds no additional parameter semantics beyond what's already in the schema - it doesn't explain parameter relationships, constraints, or usage patterns. With complete schema coverage, the baseline score of 3 is appropriate as the description doesn't compensate but also doesn't need to.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose as 'Section management within Todoist projects' with specific verbs 'create, read, update, delete, and reorder sections'. It distinguishes from sibling tools like todoist_tasks and todoist_projects by focusing specifically on sections, though it doesn't explicitly contrast with them.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention when to use sections versus other organizational methods (like labels or filters), nor does it provide context about when different actions (create vs. update vs. reorder) are appropriate. The agent must infer usage from the parameter descriptions alone.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

todoist_tasksC

Comprehensive task management for Todoist - create, read, update, delete, and query tasks with full CRUD operations and batch support

ParametersJSON Schema
NameRequiredDescriptionDefault
actionYesAction to perform
assignee_idNoAssignee user ID
batch_commandsNoBatch commands (for batch action)
contentNoTask content/title
cursorNoPagination cursor for next page (for list)
deadlineNoTask completion deadline in YYYY-MM-DD format (e.g., 2025-10-15). When work must be done by, distinct from due_date (when work should start). Use null to remove deadline. Past dates allowed (triggers reminder). Recurring tasks trigger warning (deadline stays static).
descriptionNoTask description
due_dateNoDue date (YYYY-MM-DD)
due_datetimeNoDue datetime (ISO 8601)
due_stringNoNatural language due date
label_idNoFilter by label ID (for list)
labelsNoLabel names (not IDs) - e.g., ["Work", "Important"]. Get available label names from todoist_labels tool.
langNoLanguage code for query parsing (for list)
limitNoNumber of results per page, max 200 (for list)
parent_idNoParent task ID
priorityNoPriority (1-4)
project_idNoProject ID (for create/update/list actions). When listing tasks, use this to filter by project including Inbox. Get project IDs from todoist_projects tool.
queryNoFilter query string (for list). Examples: "today" (due today), "tomorrow", "p1" (priority 1), "p2" (priority 2), "overdue", "no date", "#ProjectName" (tasks in project), "@LabelName" (tasks with label), "p1 & today" (high priority + due today). For content search use "search:" prefix: "search: meeting" (tasks containing "meeting"), "search: email & today" (tasks with "email" due today). For Inbox tasks, use project_id parameter instead of query.
section_idNoSection ID
task_idNoTask ID (required for get/update/delete/complete/uncomplete)

TDQS

C2.9/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions 'full CRUD operations and batch support' but lacks critical details like authentication requirements, rate limits, error handling, or what happens during deletions (e.g., permanent vs. reversible). For a complex 20-parameter tool with mutation capabilities, this is insufficient.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence that front-loads the core functionality. It wastes no words and directly communicates the tool's scope without unnecessary elaboration, making it easy to parse quickly.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity (20 parameters, no output schema, no annotations), the description is inadequate. It doesn't address behavioral aspects like mutation safety, response formats, or error conditions. For a comprehensive CRUD tool with batch operations, more context is needed to guide effective use.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents all parameters thoroughly. The description adds no additional parameter semantics beyond what's in the schema, such as explaining relationships between parameters or usage patterns. The baseline score of 3 reflects adequate but minimal value added by the description.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose as 'Comprehensive task management for Todoist - create, read, update, delete, and query tasks with full CRUD operations and batch support.' It specifies the resource (Todoist tasks) and verbs (CRUD operations), but doesn't explicitly differentiate from sibling tools like todoist_comments or todoist_projects, which prevents a perfect score.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention sibling tools like todoist_labels for label management or todoist_projects for project operations, nor does it specify prerequisites or contextual constraints for task management.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

  1. 7 tool updates
    • First observedtodoist_comments
    • First observedtodoist_filters
    • First observedtodoist_labels
    • First observedtodoist_projects
    • First observedtodoist_reminders
    • First observedtodoist_sections
    • First observedtodoist_tasks

TDQS

A3.6/5.0

Scored across 7 tools

Disambiguation5/5

Each tool is clearly scoped to a distinct Todoist resource (comments, filters, labels, projects, reminders, sections, tasks) with no overlap in purpose. The descriptions specify unique operations for each resource, making it easy for an agent to select the right tool without confusion.

Naming Consistency5/5

All tool names follow a consistent 'todoist_' prefix followed by the resource name in plural form (e.g., todoist_comments, todoist_tasks). This uniform pattern enhances predictability and readability across the entire tool set.

Tool Count5/5

With 7 tools, the server covers all major Todoist entities (tasks, projects, labels, etc.) without being overwhelming. This count is well-suited for the domain, providing comprehensive coverage while maintaining manageability.

Completeness5/5

The tool set offers complete CRUD/lifecycle coverage for Todoist's core resources, including tasks, projects, labels, sections, comments, filters, and reminders. There are no obvious gaps, ensuring agents can handle typical workflows without dead ends.

Maintenance

ActivityInactive
ResponsivenessNo issues

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