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hedless

Onshape MCP Server

by hedless

create_sketch_line

Create a line sketch on a standard plane by defining start and end points. Specify the plane (Front, Top, or Right) to add a line to your Onshape document.

Instructions

Create a line sketch on a standard plane

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameNoSketch nameSketch
planeNoSketch planeFront
endPointYesEnd point [x, y] in inches
elementIdYesPart Studio element ID
documentIdYesDocument ID
startPointYesStart point [x, y] in inches
workspaceIdYesWorkspace ID
Behavior2/5

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

Without annotations, the description carries full burden but adds no behavioral details such as whether it modifies an existing sketch, requires specific permissions, or has side effects. It only states the basic action.

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?

The description is a single sentence with no unnecessary words, making it concise. However, it sacrifices important content for brevity.

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?

Given the complexity (7 parameters, no output schema, no annotations), the description is insufficient. It does not explain return values, prerequisites, or behavior beyond the basic action.

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 parameters. The description adds no additional meaning beyond what is in the schema, meeting the baseline for well-covered schemas.

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 the verb 'create' and resource 'line sketch' within the context of a standard plane, effectively distinguishing it from sibling tools like create_sketch_arc and create_sketch_circle.

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 provided on when to use this tool versus alternatives, nor any conditions or prohibitions. The single sentence lacks any usage 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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