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unity_asset_create_prefab

Creates a prefab from a scene GameObject. Provide the GameObject path and the save path for the prefab asset.

Instructions

Create a prefab from an existing GameObject in the scene.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
portNoUnity instance port (from unity_select_instance). Always include it when multiple instances run.
savePathYesWhere to save the prefab (e.g. 'Assets/Prefabs/MyPrefab.prefab')
gameObjectPathYesPath of the source GameObject in the hierarchy
Behavior2/5

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

No annotations are provided, so the description bears full responsibility. However, it only states the basic action without disclosing side effects like overwriting existing prefabs, validation of input paths, or potential errors. This is insufficient.

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?

The description is a single, front-loaded sentence with no wasted words. It is concise but could include more detail without becoming verbose.

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?

No output schema is provided, and the description does not mention return values or success/failure indicators. Given the tool's simplicity, more context on what the tool returns would enhance 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 100% as all parameters have descriptions. The description adds no extra meaning beyond the schema, so a baseline of 3 is appropriate.

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 action ('Create a prefab') and the source resource ('existing GameObject in the scene'). It uniquely identifies this tool from siblings like unity_asset_instantiate_prefab, which does the reverse.

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?

The description provides no guidance on when to use this tool, prerequisites (e.g., scene must contain the GameObject), or alternatives among sibling tools. It lacks any contextual usage information.

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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