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microcmsio

microCMS MCP Server

by microcmsio

microcms_patch_content

Update existing content in microCMS by providing the endpoint, content ID, and partial data.

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")
contentIdYesContent ID to update
contentYesPartial content data to update (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.
isDraftNoSave as draft
Behavior1/5

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

No annotations are provided, so the description carries full burden. It fails to disclose that patching modifies existing content, what happens to related fields, or any permission/rate-limit considerations. The contradiction between 'publish immediately' and the isDraft parameter further reduces transparency.

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

Conciseness1/5

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

The description is excessively long, verbose, and repetitive (the same block appears twice). The opening sentence is misleading. It fails to front-load critical information; key points are buried deep in the text.

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

Completeness1/5

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

Given the complexity (5 parameters, nested objects, no output schema), the description should explain the return value and differentiate from create/update tools. It lacks any mention of success/failure behavior, error cases, or post-patch state.

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

Parameters2/5

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

Schema coverage is 100%, but the content parameter description is a near-duplicate of the global description and adds little tool-specific meaning. The custom field and iframe examples are somewhat useful but not tailored to this tool's update semantics.

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

Purpose1/5

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

The description begins with 'Create new content', which contradicts the tool name 'patch' (update operation). It also states 'publish it immediately' but the input schema includes an isDraft parameter, suggesting drafts may not be published. The purpose is misleading and unclear.

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

Usage Guidelines1/5

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 siblings like microcms_create_content_published or microcms_update_content_draft. The description only mentions calling microcms_get_list for iframe fields, but no decision context.

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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