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hashbolic

FreeCAD MCP for Codex

by hashbolic

create_box

Create and validate a Part box in FreeCAD with customizable dimensions and optional name for the new object.

Instructions

Create and validate a Part box.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameNo
widthNo
heightNo
lengthNo
doc_nameNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior2/5

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

With no annotations provided, the description must carry the full burden of behavioral disclosure. It only says 'Create and validate,' but it does not explain side effects on the active document, whether validation can fail, how errors are surfaced, or what happens to the object after creation.

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

Conciseness3/5

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

The description is short and front-loaded with the action, containing no filler words. However, it is under-specified rather than effectively concise, and the unexplained 'validate' phrase does not earn its place without elaboration.

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

Completeness2/5

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

Even though an output schema exists, the description still lacks essential context about where the box is created, how validation behaves, and what the parameters control. Given the number of sibling tools and the absence of annotations, this one-sentence description is not complete enough for reliable tool selection and invocation.

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 description coverage is 0%, and the description does not explicitly explain any of the five parameters. The word 'box' weakly implies width/height/length, but the description adds no real meaning beyond the self-evident property names and defaults already present in the schema.

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 uses a specific verb ('Create') and names a concrete resource ('Part box'), so an agent can tell this tool creates a box feature. It does not explicitly differentiate from sibling create_* tools, but the object type is distinct enough that the core purpose is clear, even though 'validate' could be more precise.

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 given about when to choose create_box instead of the many sibling creation tools such as create_cylinder or create_shell. There is no mention of prerequisites, document state, or exclusions, so the agent is left to infer the appropriate 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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