unity_asset_instantiate_prefab

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

No annotations are provided, and the description is minimal. It does not disclose what happens on failure, whether the instantiated object is returned, or any side effects like performance impact. The agent cannot infer expected behavior beyond the basic action.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence, very concise with no redundant information. However, it lacks structure such as bullet points for key details, but for a simple tool it is acceptable.

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

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

Given the lack of output schema and annotations, plus 6 parameters including nested objects, the description is insufficient. It does not cover expected results, error conditions, or parameter interactions, leaving the agent underinformed.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 67%, so the schema already documents most parameters. The description itself adds no additional parameter meaning beyond the schema. Baseline 3 is appropriate as the description does not compensate for the missing param descriptions (e.g., coordinate system for position/rotation).

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action 'Instantiate a prefab' and the target 'into the current scene'. It differentiates from siblings like 'unity_asset_create_prefab' (creating the asset) and 'unity_gameobject_create' (creating from scratch) by specifying the resource type and target.

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

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 versus alternatives, such as creating a game object from scratch or using a different instantiation path. No prerequisites or exclusion cases are mentioned.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.