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Meteor-Simulation

BULC MCP

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Shape export stl

shape_export_stl

Export exact CSG mesh as STL for CFD without voxelization. ASCII option with solid name for snappyHexMesh patches; units in meters, z-up.

Instructions

Shape Studio → CFD (OpenFOAM etc.): export the exact CSG mesh as STL (no voxelization). ascii=true for text STL with solid name (snappyHexMesh patch name). Units m, z-up. [bulc-mcp] Writes files on this PC at the path you give.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pathYesOutput .stl absolute path
asciiNo
node_idNo
solid_nameNoASCII solid name (default: shape)

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv4.0.0

TDQS

A3.9/5.0
Behavior4/5

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

Annotations cover the safety profile (readOnlyHint=false, idempotentHint=false, destructiveHint=false), and the description adds value beyond them: it warns that files are written on the local PC at the given path, and documents units (m, z-up) and the exact-CSG guarantee. Missing only error/overwrite behavior.

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?

Front-loaded with purpose, followed by the ascii/solid_name detail, units, and a bracketed file-write warning. Every sentence earns its place with no filler.

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

Completeness4/5

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

For an export tool with no output schema, the description carries the essentials: destination path semantics, units, z-up orientation, exact-mesh guarantee, and the local file-write side effect. The one gap is the undocumented node_id parameter.

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 50% (path and solid_name documented; ascii and node_id not). The description compensates for ascii (text STL) and solid_name (snappyHexMesh patch name), which is meaningful beyond the schema, but node_id remains unexplained in both places, so it only partially closes the gap.

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?

States a specific verb+resource: export the exact CSG mesh as STL. The 'no voxelization' clause genuinely distinguishes it from shape_preview_voxels and the other shape_export_* format siblings, though no sibling is named explicitly.

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

Usage Guidelines4/5

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

Provides clear use context by naming the destination workflow (CFD / OpenFOAM, snappyHexMesh patch names) and the ascii=true flag for text STL, so an agent knows the scenario this serves. No explicit exclusions or named alternatives, which keeps it at a 4 rather than a 5.

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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