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Yaeshio

FreeCAD MCP

by Yaeshio

edit_object

Edit a FreeCAD object by adjusting its properties. Use when creating a new object cannot achieve the needed shape or configuration.

Instructions

Edit an object in FreeCAD. This tool is used when the create_object tool cannot handle the object creation.

Args:
    doc_name: The name of the document to edit the object in.
    obj_name: The name of the object to edit.
    obj_properties: The properties of the object to edit.

Returns:
    A message indicating the success or failure of the object editing and a screenshot of the object.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
doc_nameYes
obj_nameYes
obj_propertiesYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

No annotations provided, so description must carry full burden. It mentions returning a success/failure message and screenshot, but lacks details on side effects, permissions, or error handling for missing objects.

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?

Description is structured with intro, arguments, and returns, but includes redundant listing of parameters that are already in the schema. Could be slightly more concise.

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?

Given that an output schema exists (not shown), the description adequately covers return values and basic behavior. Still, more detail on nested obj_properties would improve completeness.

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 0%, so description must compensate. Parameter descriptions are basic and add little beyond names, especially 'obj_properties' which is vague despite being a nested object.

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 that the tool edits an object in FreeCAD and positions it as an alternative when 'create_object' cannot handle creation, distinguishing it from sibling tools.

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 a specific condition for use (when create_object cannot handle creation), but does not contrast with other sibling tools like delete_object or get_object, leaving some ambiguity.

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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