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lanhu-mcp-server

lanhu-mcp-server

by DC911360
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lanhu_get_annotations

Extract precise design annotations including element sizes, positions, colors, and fonts from Lanhu designs to enable accurate design-to-code conversion.

Instructions

获取设计稿的标注数据（图层树），包含每个元素的尺寸、位置、颜色、字体等精确参数。

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "imageId": "<imageId>"
    },
    "name": "lanhu_get_annotations"
  }
}

Input Schema

NameRequiredDescriptionDefault
imageIdYes设计稿 image_id
projectIdNo项目 UUID

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.2.1

TDQS

B3.2/5.0
Behavior2/5

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

With no annotations, the description carries full burden for behavioral disclosure. It indicates a read operation (获取) and hints at the return content (layer tree with element details), but does not disclose potential errors, authentication needs, or constraints (e.g., required projectId context).

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

Conciseness5/5

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

The description is a single, clear sentence that efficiently communicates the tool's purpose and output. It is front-loaded and contains no filler or redundant information.

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

Completeness4/5

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

For a simple tool with two parameters and no output schema, the description adequately explains what the tool returns. However, it could benefit from noting that the data is hierarchical (layer tree) or mentioning potential error cases.

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%, achieving baseline. The description adds value by explaining what the annotation data contains (尺寸,位置,颜色,字体), but does not elaborate on how parameters influence the output beyond fetching annotations for a given image.

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: getting annotation data (layer tree) of a design draft with precise parameters. It uses a specific verb and resource, but does not explicitly distinguish it from sibling tools like lanhu_get_design_detail or lanhu_get_design_document.

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 guidance is provided on when to use this tool versus alternatives. There is no mention of prerequisites, context, or exclusions, leaving the agent to infer usage from the purpose alone.

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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