Google Tasks MCP Server
Google Tasks MCP サーバー
Google タスクを管理するためのモデル コンテキスト プロトコル (MCP) サーバー。
このTypeScriptベースのMCPサーバーは、Google Tasks APIとの統合により、MCPのコアコンセプトを実証しています。これにより、タスクを構造化され効率的に管理できます。
特徴
リソース
デフォルトのタスク リスト: URI
tasks://defaultを介してデフォルトの Google タスク リスト内のタスクにアクセスします。タスクの詳細: タイトル、メモ、完了ステータスなどのタスクに関するメタデータを提供します。
JSON MIME タイプ: タスクは機械が読み取り可能な JSON 形式で表されます。
ツール
create_task: デフォルトのタスク リストに新しいタスクを作成します。パラメータ:
title(文字列、オプション): タスクのタイトル。notes(文字列、オプション): タスクに関する追加のメモ。taskId(文字列、オプション): タスクの一意の ID。status(文字列、オプション): タスクのステータス (例: "needsAction" または "completed")。
レスポンス: 作成されたタスクの詳細を返します。
list_tasks: デフォルトのタスク リスト内のすべてのタスクを一覧表示します。パラメータ: なし。
レスポンス: デフォルトのタスク リスト内のすべてのタスクの JSON 配列を返します。
delete_task: デフォルトのタスク リストからタスクを削除します。パラメータ:
taskId(文字列、必須): 削除するタスクの ID。
応答: タスクが正常に削除されたことを確認します。
update_task: デフォルトのタスク リスト内の既存のタスクを更新します。パラメータ:
taskId(文字列、必須): 更新するタスクの ID。title(文字列、オプション): タスクの新しいタイトル。notes(文字列、オプション): タスクの新しいメモ。
レスポンス: タスクの更新された詳細を返します。
complete_task: タスクの完了ステータスを切り替えます。パラメータ:
taskId(文字列、必須): 完了ステータスを切り替えるタスクの ID。
応答: 新しいステータスを含む、更新されたタスクの詳細を返します。
Related MCP server: MCP Server
機能性
MCP を介して大規模言語モデル (LLM) またはその他のアプリケーションとの簡単な統合を提供します。
構造化されたツール定義により、タスク管理が直感的でアクセスしやすくなります。
タスクの作成、一覧表示、削除、更新、完了ステータスの切り替えを完全にサポートします。
使用法
サーバーの実行
サーバーを起動するには:
node build/index.js利用可能なコマンド
create_task: オプションのパラメータを使用して新しいタスクを作成します。{ "title": "Complete project", "notes": "Finalize module 3", "status": "needsAction" }list_tasks: デフォルトのタスク リスト内のすべてのタスクを取得します。パラメータは必要ありません。
タスクの配列を返します。
delete_task: ID でタスクを削除します。{ "taskId": "unique-task-id" }update_task: タスクのタイトル、メモ、その他の詳細を ID で更新します。{ "taskId": "unique-task-id", "title": "Updated task title", "notes": "Updated task notes" }complete_task: タスクの完了ステータスを切り替えます。{ "taskId": "unique-task-id" }
complete_taskのレスポンス例
完成前
{
"taskId": "unique-task-id",
"title": "Finish the report",
"status": "needsAction"
}完了後
{
"taskId": "unique-task-id",
"title": "Finish the report",
"status": "completed"
}デバッグ
MCPサーバーはstdio経由で通信するため、デバッグには追加のツールが必要です。MCP Inspectorの使用をお勧めします。
インスペクターを起動するには:
npm run inspectorインスペクターは、ブラウザでデバッグ ツールにアクセスするための URL を提供するため、サーバーのテストとデバッグが容易になります。
ライセンス
このMCPサーバーはMITライセンスに基づいてライセンスされています。つまり、MITライセンスの条件に従って、ソフトウェアを自由に使用、改変、配布することができます。
Available Tools
4 toolscomplete_taskC
Toggle the completion status of a task
| Name | Required | Description | Default |
|---|---|---|---|
| taskId | Yes | ID of the task to toggle completion status | |
| status | No | Status of task, needsAction or completed |
TDQS
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 states the tool 'toggles' completion status, which implies a mutation operation, but doesn't specify whether this requires permissions, is reversible, has side effects, or what the response looks like. The description lacks details on rate limits, error conditions, or how the toggle interacts with the 'status' parameter, leaving behavioral traits unclear.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence that directly states the tool's purpose without unnecessary words. It's front-loaded with the core action and resource, making it easy to parse. Every part of the sentence earns its place by conveying essential information concisely.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's complexity (a mutation operation with 2 parameters), lack of annotations, and no output schema, the description is incomplete. It doesn't cover behavioral aspects like permissions, reversibility, or response format, nor does it provide usage context relative to siblings. For a mutation tool with no structured safety or output information, the description should do more to compensate.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, with clear descriptions for both parameters ('taskId' and 'status'). The description adds no additional meaning beyond what the schema provides—it doesn't explain parameter interactions, constraints, or usage examples. Since the schema does the heavy lifting, the baseline score of 3 is appropriate, as the description neither compensates for gaps nor adds value.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the action ('toggle') and resource ('completion status of a task'), making the purpose immediately understandable. It doesn't explicitly distinguish from siblings like 'create_task' or 'delete_task', but the verb 'toggle' implies a different operation than creation or deletion. The description avoids tautology by not just restating the name 'complete_task'.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
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 'create_task' or 'delete_task'. It doesn't mention prerequisites (e.g., needing an existing task), exclusions, or contextual factors. While the action 'toggle' implies it modifies existing tasks, this is only implied rather than explicitly stated as usage guidance.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
create_taskB
Create a new task in Google Tasks
| Name | Required | Description | Default |
|---|---|---|---|
| title | Yes | Title of the task | |
| notes | No | Notes for the task |
TDQS
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 'Create' implies a write/mutation operation, the description doesn't address permission requirements, whether the operation is idempotent, what happens on failure, or any rate limits. It provides minimal behavioral context beyond the basic action.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence that states the core purpose without any wasted words. It's appropriately sized for a simple creation tool and gets straight to the point.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a creation tool with no annotations and no output schema, the description provides basic purpose but lacks important context about behavioral traits, error handling, and relationship to sibling tools. It's minimally adequate but has clear gaps in completeness given the mutation nature of the operation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, with both parameters ('title' and 'notes') fully documented in the schema. The description adds no additional parameter information beyond what the schema already provides, so the baseline score of 3 is appropriate when the schema does the heavy lifting.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the action ('Create a new task') and the target resource ('in Google Tasks'), providing a specific verb+resource combination. However, it doesn't explicitly differentiate from sibling tools like 'complete_task' or 'delete_task' beyond the obvious action difference.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance is provided about when to use this tool versus alternatives. The description doesn't mention prerequisites, when not to use it, or how it relates to sibling tools like 'list_tasks' for viewing existing tasks before creating new ones.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
delete_taskC
Delete a task from the default task list
| Name | Required | Description | Default |
|---|---|---|---|
| taskId | Yes | ID of the task to delete |
TDQS
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 states this is a deletion operation, implying it's destructive, but doesn't clarify if deletions are permanent/reversible, what permissions are required, or what happens on success/failure. For a mutation tool with zero annotation coverage, 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.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence that front-loads the core action ('Delete a task') without any wasted words. It's appropriately sized for a simple tool with one parameter.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given this is a destructive mutation tool with no annotations and no output schema, the description is incomplete. It doesn't address critical context like what 'delete' entails (permanent removal?), error conditions, or return values, leaving significant gaps for agent understanding.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema has 100% description coverage, with the single parameter 'taskId' clearly documented. The description adds no additional parameter semantics beyond implying deletion targets a specific task ID, so it meets the baseline of 3 where the schema does the heavy lifting.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the verb ('Delete') and resource ('a task from the default task list'), making the purpose immediately understandable. However, it doesn't explicitly distinguish this from sibling tools like 'complete_task' which might also remove tasks from view, though deletion is more permanent.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
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 'complete_task' or 'list_tasks'. It doesn't mention prerequisites (e.g., needing an existing task ID) or warn against misuse, leaving the agent to infer usage from context alone.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
list_tasksB
List all tasks in the default task list
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries full burden for behavioral disclosure. It states this lists 'all tasks' but doesn't clarify what 'all' means (e.g., completed vs. pending, pagination limits, or sorting). For a read operation with zero annotation coverage, this leaves significant gaps in understanding the tool's behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, efficient sentence that communicates the core purpose without any wasted words. It's front-loaded with the essential information and appropriately sized for a simple tool with no parameters.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity (0 parameters, no output schema, no annotations), the description is minimally adequate. However, for a listing operation, it should ideally mention what 'all tasks' includes (e.g., status filters, limits) or the return format, especially since there's no output schema to clarify this.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema has 0 parameters with 100% coverage, so there's no parameter documentation burden. The description appropriately doesn't waste space discussing nonexistent parameters, earning a baseline score of 4 for not adding unnecessary information.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the action ('List') and resource ('tasks in the default task list'), making the purpose immediately understandable. It doesn't explicitly differentiate from sibling tools like 'complete_task' or 'create_task', but the verb 'List' inherently distinguishes it from mutation operations.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
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. While it's obvious this is for listing tasks rather than creating or deleting them, it doesn't mention whether this should be used for initial discovery, how it relates to filtering or searching capabilities, or any prerequisites for accessing the default task list.
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.
4 tool updates
- First observed
complete_task - First observed
create_task - First observed
delete_task - First observed
list_tasks
TDQS
Scored across 4 tools
Each tool has a clearly distinct purpose targeting specific CRUD operations for tasks: list_tasks retrieves, create_task adds, complete_task updates status, and delete_task removes. There is no overlap or ambiguity between these functions.
All tool names follow a consistent verb_noun pattern with snake_case (e.g., list_tasks, create_task, complete_task, delete_task). The naming is uniform and predictable throughout the set.
With 4 tools, the count is reasonable for a task management server, covering core operations. It is slightly lean but functional; minor additions like updating task details could enhance it without being necessary.
The toolset provides essential CRUD coverage for tasks (list, create, update via complete, delete), but lacks a dedicated update tool for modifying task details like title or notes. This minor gap is workable for basic workflows.
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