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Fusion360 MCP Server

Fusion360 MCP Server

by faust-machines
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Python
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Unfold

unfold

Unfold specific bends in a sheet metal body to flatten selected areas for manufacturing or design analysis in Fusion 360 CAD automation.

Instructions

Unfold specific bends in a sheet metal body

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": {
      "body_name": "<body_name>"
    },
    "name": "unfold"
  }
}

Input Schema

NameRequiredDescriptionDefault
body_nameYes
bend_indicesNoIndices of bends to unfold (omit to unfold all)

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

B3.3/5.0
Behavior3/5

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

Annotations indicate this is a non-read-only, non-idempotent, non-destructive operation, but the description adds value by specifying it unfolds bends in sheet metal, implying a geometric transformation. However, it does not detail effects like permanence, error conditions, or interaction with other features, missing richer behavioral context.

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 wasted words, front-loading the core action. It efficiently conveys the tool's purpose without unnecessary elaboration, making it highly concise and well-structured.

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

Completeness3/5

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

For a tool with two parameters, no output schema, and annotations covering basic hints, the description is minimally adequate. It specifies the domain (sheet metal) and action but lacks details on outcomes, error handling, or integration with sibling tools, leaving gaps in full contextual understanding.

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 50%, with 'bend_indices' documented but 'body_name' lacking a description. The description mentions 'specific bends' and 'sheet metal body', aligning with parameters but not adding significant meaning beyond the schema. Baseline 3 is appropriate given partial schema coverage.

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 clearly states the action ('unfold') and target ('bends in a sheet metal body'), making the purpose evident. However, it does not explicitly differentiate from sibling tools like 'flat_pattern' or 'create_bend', which might have related sheet metal functions, so it misses the highest clarity mark.

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 such as 'flat_pattern' or 'create_bend'. The description lacks context on prerequisites, exclusions, or typical scenarios, leaving usage unclear beyond the basic action.

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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