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microcmsio

microCMS MCP Server

by microcmsio

microcms_create_content_draft

Create and publish new content in microCMS by providing structured data for specific content types, ensuring proper field formatting for images, rich text, dates, and custom fields.

Instructions

Create new content in microCMS and publish it immediately.

Important

Ensure that the "content" you submit strictly adheres to the following specifications. In particular, take extra care when handling custom fields and iframe fields, as mistakes are common in their structure. Read the instructions thoroughly and construct the data precisely as described. In particular, for extended fields (iframe fields), you need to take care to call microcms_get_list tool beforehand, and set its structure to the "data" field (Detail is described below).

Field type specifications

  • Image fields require URL string uploaded to microCMS media library (e.g., "https://images.microcms-assets.io/assets/xxx/yyy/sample.png").

  • Multiple image fields use array format.

  • Rich editor fields expect HTML strings.

  • Date fields use ISO 8601 format.

  • Select fields use arrays.

  • Content reference fields use contentId strings or arrays for multiple references, and you can get contentIds from microcms_get_list tool.

  • Custom field exepect below struct:

<field Id in apiFields> {
  "fieldId": "<target custom field id in customFields>"
  "key1": "<value1>",
  "key2": "<value2>",
}
  • iframe field (Extension field) expects the following structure for CREATE/UPDATE:

  {
    "id": "some-id",
    "title": "some-title",
    "description": "some-description",
    "imageUrl": "https://images.microcms-assets.io/assets/xxxx/yyyy/{fileName}.png",
    "updatedAt": "2024-01-01T00:00:00Z",
    "data": { "key1": "value1", "key2": "value2" }
  }
  • IMPORTANT: When retrieving content via API, only the "data" object content is returned (without the wrapper).

  • IMPORTANT: When creating/updating content, you MUST provide the full structure including id, title, description, imageUrl, updatedAt, and data.

  • To understand the "data" structure, ALWAYS use microcms_get_list to retrieve existing content first and examine the field structure.

  • "id", "title", "description", "imageUrl" are metadata displayed in the admin screen and are not included in the API GET response.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
endpointYesContent type name (e.g., "blogs", "news")
contentYesContent data to create (JSON object). Create new content in microCMS and publish it immediately. ## Important Ensure that the "content" you submit strictly adheres to the following specifications. In particular, take extra care when handling custom fields and iframe fields, as mistakes are common in their structure. Read the instructions thoroughly and construct the data precisely as described. In particular, for extended fields (iframe fields), you need to take care to call microcms_get_list tool beforehand, and set its structure to the "data" field (Detail is described below). ## Field type specifications * Image fields require URL string uploaded to microCMS media library (e.g., "https://images.microcms-assets.io/assets/xxx/yyy/sample.png"). * Multiple image fields use array format. * Rich editor fields expect HTML strings. * Date fields use ISO 8601 format. * Select fields use arrays. * Content reference fields use contentId strings or arrays for multiple references, and you can get contentIds from microcms_get_list tool. * Custom field exepect below struct: ```json <field Id in apiFields> { "fieldId": "<target custom field id in customFields>" "key1": "<value1>", "key2": "<value2>", } ``` * iframe field (Extension field) expects the following structure for CREATE/UPDATE: ```json { "id": "some-id", "title": "some-title", "description": "some-description", "imageUrl": "https://images.microcms-assets.io/assets/xxxx/yyyy/{fileName}.png", "updatedAt": "2024-01-01T00:00:00Z", "data": { "key1": "value1", "key2": "value2" } } ``` * **IMPORTANT**: When retrieving content via API, only the "data" object content is returned (without the wrapper). * **IMPORTANT**: When creating/updating content, you MUST provide the full structure including id, title, description, imageUrl, updatedAt, and data. * To understand the "data" structure, ALWAYS use microcms_get_list to retrieve existing content first and examine the field structure. * "id", "title", "description", "imageUrl" are metadata displayed in the admin screen and are not included in the API GET response.
contentIdNoSpecific content ID to assign

Implementation Reference

  • The handler function that implements the core logic of the tool: destructures input parameters, validates required 'content', configures draft creation options, and invokes the shared 'create' function from the client module.
    export async function handleCreateContentDraft(params: ToolParameters) {
      const { endpoint, content, ...options } = params;
    
      if (!content) {
        throw new Error('content is required');
      }
    
      const createOptions: MicroCMSCreateOptions = {
        isDraft: true, // Always save as draft
      };
    
      if (options.contentId) createOptions.contentId = options.contentId;
    
      return await create(endpoint, content, createOptions);
    }
  • The tool definition including name, description, and input schema for validation of parameters: endpoint (required), content (required object), and optional contentId.
    export const createContentDraftTool: Tool = {
      name: 'microcms_create_content_draft',
      description: FIELD_FORMATS_DESCRIPTION,
      inputSchema: {
        type: 'object',
        properties: {
          endpoint: {
            type: 'string',
            description: 'Content type name (e.g., "blogs", "news")',
          },
          content: {
            type: 'object',
            description: `Content data to create (JSON object). ` + FIELD_FORMATS_DESCRIPTION,
          },
          contentId: {
            type: 'string',
            description: 'Specific content ID to assign',
          },
        },
        required: ['endpoint', 'content'],
      },
    };
  • src/server.ts:97-98 (registration)
    Switch case in the CallToolRequest handler that routes calls to this tool name to the specific handleCreateContentDraft function.
    case 'microcms_create_content_draft':
      result = await handleCreateContentDraft(params);
  • src/server.ts:55-55 (registration)
    Inclusion of the createContentDraftTool in the list of tools returned by ListToolsRequest.
    createContentDraftTool,
  • src/server.ts:13-13 (registration)
    Import of the tool definition and handler function from the implementation file.
    import { createContentDraftTool, handleCreateContentDraft } from './tools/create-content-draft.js';
Behavior3/5

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

With no annotations provided, the description carries full burden. It clearly indicates this is a write operation ('create new content') and mentions immediate publishing, but lacks details on permissions required, error handling, rate limits, or what happens on failure. The field specifications add some behavioral context but don't cover the full mutation profile.

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

Conciseness2/5

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

The description is overly long and poorly structured, with significant duplication between the main description and the schema's description field. While it contains important information, it's not front-loaded efficiently and includes repetitive formatting specifications that could be streamlined.

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 mutation tool with no annotations and no output schema, the description provides substantial field formatting guidance but misses critical context about permissions, error responses, and tool selection. The field specifications are detailed but don't compensate for the lack of behavioral transparency needed for a content creation 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?

Schema description coverage is 100%, so the schema already documents all three parameters. The description adds extensive field formatting details for the 'content' parameter, but these are largely redundant with the schema's description field. No additional parameter meaning beyond what's in the schema is provided.

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 'Create new content in microCMS and publish it immediately,' which is a specific verb+resource action. However, it doesn't explicitly differentiate from sibling tools like 'microcms_create_content_published' (which might have similar functionality) or explain when to use draft vs. published creation tools.

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 'microcms_create_content_published' or 'microcms_create_contents_bulk_draft.' It mentions using 'microcms_get_list' for understanding field structures but doesn't explain tool selection criteria or prerequisites beyond field formatting.

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

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