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simple-3d-modeling-mcp

simple-3d-modeling-mcp

by mazzanfar
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Local

read_scad_file

Load an OpenSCAD (.scad) file from your disk to inspect its source code and prepare it for editing or validation.

Instructions

Read an OpenSCAD (.scad) file from disk.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "path": "<path>"
    },
    "name": "read_scad_file"
  }
}

Input Schema

NameRequiredDescriptionDefault
pathYesAbsolute path to the .scad file

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.2.12

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only states that the tool reads a file from disk, but does not disclose whether this is a safe read-only operation, how missing files or invalid paths are handled, or what the response looks like. The behavioral context is too thin for an agent relying solely on the description.

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?

The description is a single, direct sentence with no filler. It front-loads the action and resource, making it easy for an agent to parse quickly. Every word earns its place.

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 that there are no annotations and no output schema, the description should explain return values and invocation context more fully. It specifies the required path parameter but does not tell the agent what it receives after the read, how errors surface, or when this is the right tool among the siblings. The description is minimal but leaves important gaps.

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?

The input schema already provides full coverage for the single 'path' parameter, including a description ('Absolute path to the .scad file'). The description adds no additional parameter-level meaning, but since schema coverage is 100%, the baseline score of 3 is appropriate.

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 states a specific action ('Read') and resource ('OpenSCAD (.scad) file from disk'), which clearly distinguishes it from sibling tools like render, export, or validate. It does not specify whether the tool returns the raw file contents or a parsed representation, but the verb and resource are unambiguous enough for basic selection.

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 about when to use this tool versus alternatives. The description does not mention scenarios where read_scad_file is preferred over render, validate, or open_viewer, leaving the agent to infer when file reading is appropriate.

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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