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tomo1230

FreeCAD MCP Server

by tomo1230

revolve_sketch

Revolve a sketch around an axis to generate a 3D solid. Set axis (x, y, or z) and angle in degrees.

Instructions

FreeCAD tool: revolve_sketch

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sketch_nameNoBody name
body_nameNoBody name
axisNox|y|zz
angleNoRevolve angle (deg)
Behavior1/5

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

No annotations; description fails to disclose any behavioral traits such as whether the tool is destructive, requires a closed sketch, or creates a new body. Completely opaque.

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

Conciseness2/5

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

Extremely short but not effectively concise; lacks essential information. Under-specification outweighs any benefit of brevity.

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

Completeness1/5

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

For a tool with 4 parameters and no annotations or output schema, the description is grossly incomplete. Does not explain axis orientation, angle behavior, or result of the operation.

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 100%, so schema already documents all 4 parameters. Description adds no extra meaning beyond the schema. Baseline score is appropriate.

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

Purpose2/5

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

Description merely states 'FreeCAD tool: revolve_sketch', which restates the name without clarifying the action. It does not explicitly say that it creates a revolved feature from a sketch, leaving ambiguity.

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 on when to use revolve_sketch vs siblings like extrude_sketch, loft_sketches, or sweep_sketch. No prerequisites or exclusions provided.

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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