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Tarkiin

SketchUp MCP Server

by Tarkiin

create_box

Construct a 3D rectangular prism by defining width, depth, and height, with optional base corner origin.

Instructions

Create a 3-D box (rectangular prism) by specifying width, depth, height. Optionally provide an origin [x, y, z] for the base corner.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
depthYesSize along Y axis
layerNo
widthYesSize along X axis
heightYesSize along Z axis
originNo[x, y, z] base corner (default [0,0,0])
materialNo
Behavior3/5

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

With no annotations, the description carries the burden. It reveals core creation behavior but omits side effects (e.g., entity creation, defaults for layer/material, return value). Adequate but not comprehensive.

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 with no filler. Information is front-loaded and every word is purposeful. Perfectly concise for a simple tool.

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 no output schema and 6 parameters, the description covers the core functionality but is incomplete regarding optional parameters (layer, material) and what the tool returns or modifies. Adequate but not fully complete.

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 coverage is 67%. The description adds meaning for width, depth, height, and origin (as base corner) but fails to mention layer and material parameters, which are left undocumented.

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 'Create a 3-D box (rectangular prism)' with a specific verb and resource, distinguishing it from 2D shape tools like create_face or create_circle among siblings.

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?

The description implies usage for creating box primitives by specifying dimensions, but lacks explicit when-not or alternative guidance. Context from tool name and description is strong enough.

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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