Skip to main content
Glama
dsh18235538266-crypto

onshape-mcp-codex

create_circular_pattern

Duplicates selected features around a chosen axis in Onshape, letting you set instance count, total angle, and axis direction to build circular arrays for parametric CAD.

Instructions

Create a circular pattern of features around an axis

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
axisNoPattern axisZ
nameNoPattern nameCircular pattern
angleNoTotal angle spread in degrees
countYesTotal number of instances
elementIdYesPart Studio element ID
documentIdYesDocument ID
featureIdsYesFeature IDs to pattern
workspaceIdYesWorkspace ID

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

C2.9/5.0
Behavior2/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure, but it only restates the action. It does not mention that this modifies the Part Studio by adding a feature, whether existing features must already be present, what happens on execution, or whether it returns the created pattern's ID. For a mutation tool with zero annotation coverage, this is a significant gap.

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?

A single 11-word sentence with no filler, front-loaded with the verb 'Create'. Every word earns its place and the structure is optimally scannable for an agent.

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?

Despite being an 8-parameter tool with no annotations and no output schema, the description offers only a one-line purpose. It omits operational context such as the angle/count relationship, default behaviors (360 degrees, Z axis), prerequisites for featureIds, and what response to expect. The rich schema descriptions help but cannot fully compensate for missing execution context.

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 description coverage is 100%, so the schema already documents all 8 parameters, giving a baseline of 3. The phrase 'around an axis' adds slight semantic reinforcement to the axis/angle parameters, but the description otherwise does not enrich parameter meaning beyond what the schema provides.

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'), a clear resource ('a circular pattern of features'), and a mechanism ('around an axis'), making the basic purpose unambiguous. However, it does not explicitly differentiate itself from the sibling tool create_linear_pattern; only the word 'circular' carries that distinction.

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 use this tool versus alternatives. With 70+ sibling tools including create_linear_pattern, the agent receives no routing information about choosing circular vs linear patterning, what features must exist first, or when this tool is inappropriate.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.