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nkarasiak

QGIS MCP

by nkarasiak

Render Map

render_map
Idempotent

Render the current QGIS map canvas as an inline image, with optional export to a file on disk.

Instructions

Render the current map canvas to an image. Returns the image inline so you can see it. Optionally saves to a file path on disk.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pathNo
widthNo
heightNo
Behavior3/5

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

Annotations indicate idempotentHint=true, which the description does not contradict. The description adds that the tool returns inline and can save to disk, but does not disclose other behavioral aspects like file format or state changes beyond saving.

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

Conciseness4/5

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

Two efficient sentences front-loading the main purpose and output, with no extraneous words. Could be improved by briefly noting parameters, but remains concise and clear.

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?

Lacks output schema, so description must explain return value; it does ('image inline'). However, it omits details on file format, behavior when path is null vs. string, and error handling. Adequate but with gaps.

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?

With 0% schema description coverage, the description must compensate. It only explains the 'path' parameter (optional save to file), but does not describe 'width' and 'height' parameters, leaving their meaning ambiguous.

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 it renders the current map canvas to an image and returns it inline or optionally saves to disk. However, it does not differentiate from the sibling tool 'get_canvas_screenshot', which may have similar functionality.

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 'get_canvas_screenshot' or 'export_layout'. There are no context hints for when to use or avoid this tool.

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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