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RFingAdam

drawio-engineering-mcp

by RFingAdam

export_drawio

Export draw.io diagram XML to SVG or PNG image files. SVG conversion is done locally; PNG uses a headless browser when available.

Instructions

Exports a draw.io diagram XML to an SVG or PNG file. For SVG export, the diagram is converted locally without requiring a browser. For PNG export, a headless browser (puppeteer) is used if available. Returns the file path of the exported image.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
contentYesThe draw.io XML content (mxGraphModel format) to export
formatNoExport format. Default: svg
output_pathNoOutput file path. If not specified, a temporary file is created.
widthNoOutput width in pixels (PNG only). Default: 800
heightNoOutput height in pixels (PNG only). Default: 600
Behavior3/5

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

No annotations provided, so description bears full burden. It explains conversion mechanisms but omits potential failures (e.g., if puppeteer unavailable for PNG) and side effects beyond file creation.

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?

Two sentences, front-loaded with purpose, no wasted words. Efficiently conveys all key 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?

Covers return value, parameter defaults, and format differences. With no output schema, description adequately rounds out understanding. Minor gap: no mention of content validation.

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 has 100% coverage with basic descriptions; description adds behavioral details for format and output_path (default tmp file). Provides value beyond schema.

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

Purpose5/5

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

The description clearly states the verb 'exports' and the specific resource (draw.io diagram XML to SVG or PNG), distinguishing it from sibling tools that open or read drawio files.

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

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides context on when to use SVG vs PNG based on browser requirement, but lacks explicit when-not-to-use or alternative tool mentions.

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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