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pzfreo

build123d-mcp

by pzfreo

find_bosses

Read-only

Detect external cylindrical bosses on a 3D CAD model, including turned part ODs, filtering local bosses by diameter, and return JSON with count and each boss's axis, location, diameter, and height.

Instructions

Recognise external cylindrical bosses on a session object (defaults to current shape), including a turned part's OD — filter on diameter against the part envelope for local bosses only. Returns JSON: {count, bosses: [{axis (base toward free end), location (free-end point), diameter, height}]}.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
object_nameNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

The description discloses the output format (JSON with count and boss details) and the read-only nature (consistent with readOnlyHint). Adds behavioral context beyond annotations.

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, front-loaded with purpose, then output format. No wasted words.

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

Completeness5/5

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

Given the one parameter and explicit output schema in the description, the tool definition is fully informative for an agent.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

With 0% schema parameter coverage, the description explains the single parameter 'object_name' as a session object defaulting to current shape, compensating for missing schema descriptions.

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 tool recognizes external cylindrical bosses, including on turned parts, with filtering for local bosses. It differentiates from siblings like find_holes by specifying boss detection.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description mentions filtering for local bosses, implying when to use, but does not explicitly state when not to use or provide alternatives.

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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