Notion ReadOnly MCP Server
Notion 読み取り専用 MCP サーバー
このプロジェクトは、Notion API 用に最適化された読み取り専用 MCP サーバーを実装し、AI アシスタントが Notion コンテンツを照会および取得する際のパフォーマンスと効率に重点を置いています。
主な改善点
読み取り専用設計: データ取得操作のみに焦点を当て、Notion コンテンツへの安全なアクセスを保証します。
ツール セットの最小化: 公開されている Notion API ツールの数を 15 個以上から、ドキュメント分析に不可欠な 6 個に削減しました。
並列処理: ブロック コンテンツを取得するための非同期および並列 API リクエストを実装することでパフォーマンスが向上し、応答時間が大幅に短縮されます。
拡張データベース アクセス: データベース、ページ プロパティ、およびコメントの取得操作のサポートが追加されました。
AI アシスタント向けに最適化: ツール数を大幅に削減することで、モデルを約 40 個のツールに制限する Cursor などの AI アシスタントの「ツールが多すぎるとパフォーマンスが低下する可能性がある」問題に対処します。
Related MCP server: notion-slim
ツールの比較
この読み取り専用実装では、標準の Notion API 統合と比較して公開されるツールがはるかに少なくなり、AI アシスタントとのパフォーマンスと互換性が向上します。

ツール セットを削減することで、すべての重要な機能を提供しながら、推奨ツール制限内にとどまり、AI アシスタントのパフォーマンスを最適化できます。
インストール
1. Notionでの統合の設定:
https://www.notion.so/profile/integrationsにアクセスし、新しい内部統合を作成するか、既存の統合を選択します。

Notion APIの公開範囲は読み取り専用操作に限定されていますが、LLMに公開することでワークスペースデータへのリスクがゼロではありません。セキュリティを重視するユーザーは、統合機能をさらに設定することをお勧めします。
たとえば、「構成」タブから「コンテンツの読み取り」アクセス権のみを付与することで、読み取り専用の統合トークンを作成できます。

2. クライアントに MCP 構成を追加する:
npm を使用する場合:
.cursor/mcp.jsonまたはclaude_desktop_config.jsonに次のコードを追加します (MacOS: ~/Library/Application\ Support/Claude/claude_desktop_config.json )
{
"mcpServers": {
"notionApi": {
"command": "npx",
"args": ["-y", "notion-readonly-mcp-server"],
"env": {
"OPENAPI_MCP_HEADERS": "{\"Authorization\": \"Bearer ntn_****\", \"Notion-Version\": \"2022-06-28\" }"
}
}
}
}Docker の使用:
.cursor/mcp.jsonまたはclaude_desktop_config.jsonに以下を追加します。
{
"mcpServers": {
"notionApi": {
"command": "docker",
"args": [
"run",
"--rm",
"-i",
"-e", "OPENAPI_MCP_HEADERS",
"taewoong1378/notion-readonly-mcp-server"
],
"env": {
"OPENAPI_MCP_HEADERS": "{\"Authorization\":\"Bearer ntn_****\",\"Notion-Version\":\"2022-06-28\"}"
}
}
}
}ntn_****統合シークレットに置き換えることを忘れないでください。統合設定タブから確認できます。
3. コンテンツを統合に接続する:
関連するページとデータベースが統合に接続されていることを確認します。
これを行うには、ページにアクセスし、3 つのドットをクリックして、「統合に接続」を選択します。

利用可能なツール
この最適化されたサーバーは、必須の読み取り専用 Notion API ツールのみを公開します。
API-retrieve-a-page: ページ情報を取得するAPI-get-block-children: ページコンテンツブロックを取得する(並列処理)API-retrieve-a-block: 特定のブロックの詳細を取得するAPI-retrieve-a-database: データベース情報を取得するAPI-retrieve-a-comment: ページまたはブロックのコメントを取得するAPI-retrieve-a-page-property: ページから特定のプロパティ情報を取得するAPI-get-one-pager:新機能! Notionページ全体を、そのブロック、データベース、関連コンテンツをすべて1回の呼び出しで再帰的に取得します。
標準実装では 15 個以上のツールが必要ですが、これら 7 つの必須ツールに制限することで、次のことが保証されます。
ツール数制限のあるカーソルやクロードなどのAIアシスタントのパフォーマンスが向上しました
適切なツールを選択する際のAIモデルの認知負荷の軽減
考慮すべき API オプションが少なくなり、応答時間が短縮されます
APIの表面積を最小化することでセキュリティを強化
自動コンテンツ探索
新しいAPI-get-one-pagerツールは、複数の API 呼び出しを必要とせずに Notion ページを探索する強力な方法を提供します。
再帰検索: ネストされたブロックを含むページ構造全体を自動的に走査します
並列処理: 複数のブロックとその子を同時に取得して、パフォーマンスを最大限に高めます。
インテリジェントキャッシュ: 取得したデータを保存して冗長なAPI呼び出しを最小限に抑えます
包括的なコンテンツ: ページ、ブロック、データベース、コメント、詳細なプロパティ情報が含まれます
カスタマイズ可能な深さ: 再帰のレベルを制御して詳細とパフォーマンスのバランスをとる
ワンページャーツールの使用
{
"page_id": "YOUR_PAGE_ID",
"maxDepth": 5, // Optional: Maximum recursion depth (default: 5)
"includeDatabases": true, // Optional: Include linked databases (default: true)
"includeComments": true, // Optional: Include comments (default: true)
"includeProperties": true // Optional: Include detailed page properties (default: true)
}この自動探索機能は、数十もの個別の API 呼び出しを行わずに Notion ページのコンテンツ全体を理解する必要のある AI アシスタントにとって特に役立ち、応答の速度と効率が大幅に向上します。
非同期処理
サーバーは、大規模な Notion ドキュメントを処理するための高度な並列処理技術を実装しています。
複数のリクエストがバッチ処理され、同時に処理されます
ブロックの子のページネーションは自動的に処理されます
結果は返される前に効率的に集計されます
コンソールログは、応答形式に影響を与えずにプロセスを可視化します。
例
次の命令を使用します。
Get the content of page 1a6b35e6e67f802fa7e1d27686f017f2AI はブロック コンテンツを並列処理してページの詳細を効率的に取得します。
データベース情報の使用:
Get the structure of database 8a6b35e6e67f802fa7e1d27686f017f2発達
建てる:
pnpm build実行する:
pnpm devライセンス
マサチューセッツ工科大学
AIアシスタントのパフォーマンスメリット
Cursor や Claude などの最新の AI アシスタントでは、効果的に処理できるツールの数に制限があります。
ほとんどのモデルは合計40個を超えるツールを尊重しない可能性があります
ツールが多すぎると、全体的なパフォーマンスと推論能力が低下する可能性があります
複雑なツールセットは応答の遅延と意思決定の困難さを増加させる
この読み取り専用実装は、これらの制限に対処するために、Notion API のサーフェスを意図的に縮小しつつ、すべての必須機能を維持しています。その結果、次のようになります。
AIアシスタントからのより高速で信頼性の高い応答
Notionコンテンツを操作する際の精度が向上
集中的なAPI設計による全体的なパフォーマンスの向上
Available Tools
8 toolsAPI-get-background-resultC
Retrieve the result of a background processing request
| Name | Required | Description | Default |
|---|---|---|---|
| page_id | Yes | Identifier for the Notion page that was processed in background |
TDQS
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 states this is a retrieval operation, implying it's likely read-only, but doesn't clarify authentication needs, rate limits, error conditions, or what happens if the background processing isn't complete. For a tool with zero annotation coverage, this leaves 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.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, clear sentence with zero waste. It's appropriately sized and front-loaded, efficiently conveying the core purpose without unnecessary elaboration.
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 lack of annotations and output schema, the description is incomplete. It doesn't explain what the result contains (e.g., status, data, errors), how to handle pending processing, or any dependencies. For a tool that retrieves background processing results, this leaves critical context gaps for an agent.
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 'page_id' documented as 'Identifier for the Notion page that was processed in background'. The description adds no additional meaning beyond this, such as format examples or constraints, 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 ('Retrieve') and resource ('result of a background processing request'), making the purpose understandable. However, it doesn't differentiate this tool from its siblings (like API-retrieve-a-page or API-retrieve-a-database), which also retrieve data but for different resources.
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. It doesn't mention prerequisites (e.g., that a background processing request must have been initiated first) or compare it to sibling tools that retrieve other types of data, leaving the agent to infer usage context.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
API-get-block-childrenC
Retrieve block children
| Name | Required | Description | Default |
|---|---|---|---|
| block_id | Yes | Identifier for a [block](ref:block) | |
| start_cursor | No | If supplied, this endpoint will return a page of results starting after the cursor provided. If not supplied, this endpoint will return the first page of results. | |
| page_size | No | The number of items from the full list desired in the response. Maximum: 100 |
TDQS
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. 'Retrieve' implies a read-only operation, but it does not specify critical traits like pagination behavior (implied by 'start_cursor' and 'page_size' in the schema), rate limits, authentication needs, or error handling. The description adds minimal context beyond the basic action, leaving gaps in understanding how the tool behaves in practice.
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 'Retrieve block children' is extremely concise—just three words—and front-loaded with the core action. There is no wasted language or unnecessary elaboration, making it efficient for quick comprehension. Every word earns its place by directly stating the tool's function.
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 complexity of a paginated retrieval tool with no annotations and no output schema, the description is incomplete. It does not explain what 'block children' are, the return format, pagination details, or error conditions. While the schema covers inputs, the lack of behavioral and output information makes it inadequate for an agent to use the tool effectively without additional context.
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%, meaning the input schema fully documents all parameters ('block_id', 'start_cursor', 'page_size') with clear descriptions. The description does not add any meaning beyond this, such as explaining relationships between parameters or usage examples. According to the rules, with high schema coverage, the baseline score is 3, as the description does not compensate but also does not detract.
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 'Retrieve block children' states the verb ('Retrieve') and resource ('block children'), making the purpose clear. However, it lacks specificity about what 'block children' are (e.g., nested content in a Notion-like system) and does not differentiate from sibling tools like 'API-retrieve-a-block', which might retrieve a single block rather than its children. This vagueness prevents a higher score.
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. It does not mention sibling tools such as 'API-retrieve-a-block' or 'API-retrieve-a-page', nor does it specify contexts like fetching hierarchical content. Without any usage context or exclusions, the agent must infer when to apply it, leading to potential misuse.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
API-get-one-pagerB
Recursively retrieve a full Notion page with all its blocks, databases, and related content
| Name | Required | Description | Default |
|---|---|---|---|
| page_id | Yes | Identifier for a Notion page | |
| maxDepth | No | Maximum recursion depth (default: 5) | |
| includeDatabases | No | Whether to include linked databases (default: true) | |
| includeComments | No | Whether to include comments (default: true) | |
| includeProperties | No | Whether to include detailed page properties (default: true) | |
| maxParallelRequests | No | Maximum number of parallel requests (default: 15) | |
| batchSize | No | Batch size for parallel processing (default: 10) | |
| timeoutMs | No | Timeout in milliseconds (default: 300000) | |
| runInBackground | No | Process request in background without timeout (default: true) |
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 mentions recursion and content inclusion but lacks details on performance implications, error handling, rate limits, authentication needs, or what the output looks like. For a complex tool with 9 parameters, this is a significant gap in transparency.
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 purpose without unnecessary words. It directly communicates the tool's function, making it highly concise and well-structured for quick understanding.
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 (9 parameters, no annotations, no output schema), the description is insufficient. It lacks information on output format, error conditions, performance trade-offs, and when to use alternatives, leaving the agent with incomplete context for effective tool invocation.
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%, so the schema fully documents all parameters. The description adds no additional parameter semantics beyond implying recursion and content scope, which is already covered by parameter names like 'maxDepth' and 'includeDatabases'. 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.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the action ('recursively retrieve') and the resource ('full Notion page with all its blocks, databases, and related content'), making the purpose specific and unambiguous. It distinguishes from siblings like 'API-retrieve-a-page' by emphasizing the comprehensive, recursive nature of the retrieval.
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. It does not mention any prerequisites, exclusions, or compare it to sibling tools like 'API-retrieve-a-page' for simpler needs or 'API-get-background-result' for background processing, leaving the agent without usage context.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
API-retrieve-a-blockC
Retrieve a block
| Name | Required | Description | Default |
|---|---|---|---|
| block_id | Yes | Identifier for a Notion block |
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 but fails to add any meaningful context. It doesn't specify whether this is a read-only operation, what permissions are required, potential rate limits, error conditions, or the format of returned data. The description is too minimal to provide useful behavioral insights beyond the basic action implied by 'retrieve'.
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 extremely concise at just two words ('Retrieve a block'), with zero wasted language. It's front-loaded with the core action, though this brevity comes at the cost of completeness. Every word serves a purpose in stating the basic function, making it structurally efficient despite its limitations.
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 (1 parameter, 100% schema coverage) but lack of annotations and output schema, the description is incomplete. It doesn't explain what 'retrieve' entails (e.g., returns block content, metadata, or both), how it differs from sibling tools, or any behavioral aspects. For a retrieval tool in a family of similar tools, more context is needed to guide proper usage.
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 schema description coverage is 100%, with the single parameter 'block_id' clearly documented as 'Identifier for a Notion block' in the schema. The description adds no additional parameter information beyond what the schema provides, so it meets the baseline score of 3 for adequate coverage when the schema handles parameter documentation effectively.
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 'Retrieve a block' is a tautology that essentially restates the tool name 'API-retrieve-a-block', providing no additional specificity. It mentions the verb 'retrieve' and resource 'block', but doesn't distinguish what kind of block (Notion block is only implied by the parameter description in the schema) or what information is retrieved, making it vague compared to more specific alternatives.
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 sibling tools like 'API-retrieve-a-page', 'API-retrieve-a-database', or 'API-get-block-children'. There's no mention of prerequisites, alternatives, or contextual constraints, leaving the agent with no usage direction beyond the tool name.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
API-retrieve-a-commentC
Retrieve comments
| Name | Required | Description | Default |
|---|---|---|---|
| block_id | Yes | Identifier for a Notion block or page | |
| start_cursor | No | If supplied, this endpoint will return a page of results starting after the cursor provided. If not supplied, this endpoint will return the first page of results. | |
| page_size | No | The number of items from the full list desired in the response. Maximum: 100 |
TDQS
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. 'Retrieve comments' implies a read-only operation, but it doesn't specify authentication needs, rate limits, error handling, or pagination behavior. The description lacks details on what 'retrieve' entails, such as whether it returns all comments or supports filtering, 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 extremely concise with 'Retrieve comments', which is front-loaded and wastes no words. However, it may be overly brief, risking under-specification. For a tool with three parameters and no annotations, more detail could be beneficial, but the current form is structurally efficient.
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 has 3 parameters, no annotations, and no output schema, the description is incomplete. It doesn't explain the return values, error cases, or operational context. For a retrieval tool in a Notion API context, more information on what 'comments' are and how they relate to 'block_id' would enhance completeness.
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 documentation for 'block_id', 'start_cursor', and 'page_size'. The description adds no parameter-specific information beyond the schema. Since the schema is comprehensive, a baseline score of 3 is appropriate, as the description doesn't compensate but also doesn't detract from the schema's clarity.
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 'Retrieve comments' restates the tool name with minimal elaboration. It specifies the action ('retrieve') and resource ('comments'), but lacks detail about scope or context, making it vague. Compared to siblings like 'API-retrieve-a-block' or 'API-retrieve-a-page', it doesn't clearly differentiate what makes retrieving comments unique, beyond the resource type.
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 on when to use this tool versus alternatives. The description doesn't mention prerequisites, context, or exclusions. Given siblings like 'API-get-block-children' that might overlap in functionality, the absence of usage guidelines leaves the agent without direction on tool selection.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
API-retrieve-a-databaseC
Retrieve a database
| Name | Required | Description | Default |
|---|---|---|---|
| database_id | Yes | An identifier for the Notion database. |
TDQS
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 only states the action ('Retrieve') without detailing aspects like authentication requirements, rate limits, error handling, or what the retrieval entails (e.g., read-only operation, data format returned). 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 extremely concise with just two words, making it front-loaded and free of unnecessary information. Every word earns its place, though this brevity contributes to gaps in other dimensions like purpose clarity and guidelines.
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 lack of annotations and output schema, the description is incomplete for a retrieval tool. It fails to explain what is retrieved (e.g., database properties, schema, content), potential side effects, or response format, leaving the agent with insufficient context to use the tool effectively.
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 'database_id' clearly documented as 'An identifier for the Notion database.' The description adds no additional semantic context beyond this, so it meets the baseline score 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 'Retrieve a database' is a tautology that essentially restates the tool name 'API-retrieve-a-database' without adding meaningful specificity. While it indicates a retrieval action on a database resource, it lacks details about what exactly is retrieved (structure, content, metadata) and doesn't differentiate from sibling tools like 'API-retrieve-a-page' or 'API-retrieve-a-block' beyond the resource type.
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. There are no explicit instructions, prerequisites, or comparisons to sibling tools (e.g., when to retrieve a database vs. a page or block), leaving the agent with no contextual cues for selection.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
API-retrieve-a-pageC
Retrieve a page
| Name | Required | Description | Default |
|---|---|---|---|
| page_id | Yes | Identifier for a Notion page | |
| filter_properties | No | A list of page property value IDs associated with the page. Use this param to limit the response to a specific page property value or values. To retrieve multiple properties, specify each page property ID. For example: `?filter_properties=iAk8&filter_properties=b7dh`. |
TDQS
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. 'Retrieve a page' implies a read-only operation but doesn't specify authentication requirements, rate limits, error handling, or what the response contains. For a tool with no annotation coverage, this is a significant gap in behavioral transparency.
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 extremely concise with just two words, 'Retrieve a page', which is front-loaded and wastes no space. While under-specified in content, it earns full marks for brevity and structure as every word contributes directly to the core purpose without redundancy.
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 complexity of a retrieval tool with 2 parameters, no annotations, and no output schema, the description is incomplete. It doesn't explain what a 'page' is in context (Notion), how results are returned, or any behavioral aspects. The agent lacks sufficient context to use this tool effectively beyond basic parameter passing.
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 schema description coverage is 100%, with both parameters ('page_id' and 'filter_properties') fully documented in the input schema. The description adds no additional parameter information beyond what the schema provides, so it meets the baseline score of 3 for adequate coverage when the schema handles 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 'Retrieve a page' is a tautology that essentially restates the tool name 'API-retrieve-a-page'. It doesn't specify what kind of page (Notion page) or provide any distinguishing context from sibling tools like 'API-retrieve-a-database' or 'API-retrieve-a-block'. The purpose is minimally stated but lacks specificity and differentiation.
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 on when to use this tool versus alternatives. With sibling tools like 'API-retrieve-a-database' and 'API-retrieve-a-block', the description offers no context about when this tool is appropriate, what prerequisites exist, or when other tools might be better suited. This leaves the agent without usage direction.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
API-retrieve-a-page-propertyC
Retrieve a page property item
| Name | Required | Description | Default |
|---|---|---|---|
| page_id | Yes | Identifier for a Notion page | |
| property_id | Yes | Identifier for a page [property](https://developers.notion.com/reference/page#all-property-values) | |
| page_size | No | For paginated properties. The max number of property item objects on a page. The default size is 100 | |
| start_cursor | No | For paginated properties. |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries full burden. It only states the action ('retrieve') without disclosing behavioral traits such as authentication needs, rate limits, error handling, or what 'retrieve' entails operationally (e.g., read-only, data format). This leaves significant gaps for a tool with 4 parameters.
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 with zero waste. It's appropriately sized and front-loaded, making it easy to parse without unnecessary elaboration.
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 no annotations, no output schema, and a tool with 4 parameters, the description is incomplete. It fails to address key aspects like return values, error cases, or operational context, making it inadequate for effective tool selection and invocation.
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%, so parameters are well-documented in the schema. The description adds no meaning beyond the schema, as it doesn't explain parameter relationships or usage context. Baseline 3 is appropriate since 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 'Retrieve a page property item' states the action (retrieve) and target (page property item), which is clear but vague. It doesn't specify what a 'property item' entails or differentiate from siblings like 'API-retrieve-a-page' or 'API-retrieve-a-database', leaving ambiguity about scope.
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 on when to use this tool versus alternatives. With siblings like 'API-retrieve-a-page' and 'API-retrieve-a-database', the description lacks context for choosing this specific retrieval tool, offering no explicit or implied usage scenarios.
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.
8 tool updates
- First observed
API-get-background-result - First observed
API-get-block-children - First observed
API-get-one-pager - First observed
API-retrieve-a-block - First observed
API-retrieve-a-comment - First observed
API-retrieve-a-database - First observed
API-retrieve-a-page - First observed
API-retrieve-a-page-property
TDQS
Scored across 8 tools
Most tools have distinct purposes targeting specific Notion resources (blocks, pages, databases, comments, properties), but 'API-retrieve-a-block' and 'API-get-block-children' could cause confusion as both relate to blocks with overlapping retrieval functions. The descriptions help clarify, but the boundary isn't perfectly clear.
The naming follows a mostly consistent 'API-[verb]-a-[noun]' pattern for seven tools, but 'API-get-background-result' and 'API-get-one-pager' deviate with different verb structures ('get' vs 'retrieve') and compound nouns. This mixed convention reduces predictability, though the names remain readable.
With 8 tools, the count is well-scoped for a read-only Notion server, covering key retrieval operations without bloat. Each tool serves a clear purpose, making the set manageable and focused on the server's stated functionality.
For a read-only server, the tool set provides comprehensive coverage of Notion's core resources (pages, blocks, databases, comments, properties) and includes useful utilities like background result retrieval. A minor gap exists in lacking a tool for listing/searching across multiple resources, but agents can work around this with the available retrieval tools.
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