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microcmsio

microCMS MCP Server

by microcmsio

microcms_create_content_draft

Create a new content draft in microCMS with specified endpoint and content data. Ensure proper field structure for custom and iframe fields by referencing existing content.

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
serviceIdNoService ID (required in multi-service mode, optional in single-service mode)
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
Behavior3/5

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

With no annotations, the description carries full burden. It explains field type details and the need to provide full structure for creation, but it does not disclose error behavior, idempotency, or what happens on failure. The contradiction between name and description is noted but not counted as annotation contradiction.

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 very long and repetitive, especially with the content parameter description mirroring the tool description. It lacks concise structure; key points are buried in a large block of field specs.

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 complexity of custom and iframe fields, the description provides thorough field type specs. However, it fails to describe the return value (e.g., success response), error handling, or how to handle cases like missing required fields. The draft vs publish ambiguity also detracts.

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

Parameters4/5

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

Schema coverage is 100%, but the description adds significant value for the 'content' parameter, detailing field type specifications, JSON structures, and prerequisites. This goes well beyond the schema type definition.

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

Purpose2/5

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

The description states 'Create new content and publish it immediately,' but the tool name indicates 'draft', causing confusion. It does not distinguish from the sibling 'microcms_create_content_published' which likely does the same. This mismatch undermines clarity.

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?

No explicit guidance on when to use this tool over siblings like 'microcms_create_content_published' or 'microcms_create_contents_bulk_draft'. The only mention is to call 'microcms_get_list' for iframe fields, which is a prerequisite, not a usage guideline.

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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