import_image_as_layer

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

With no annotations provided, the description carries full burden. It discloses that 'the layer is created if it does not exist' and implies the tool modifies the file, but omits side effects (e.g., whether existing content on the layer is overwritten) and does not mention any required permissions or error conditions.

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 brief and well-structured with a short introductory paragraph followed by a clear parameter list. No extraneous text, but the parameter descriptions could be condensed slightly by removing the repeated 'parameter: meaning' pattern.

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?

No output schema is provided, and the description does not explain what the tool returns (if anything) or how to handle errors. Given the tool has 6 parameters (3 required) and modifies a file, additional context about success indicators or failure modes would be beneficial.

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?

The schema has 0% description coverage, but the description includes an Args section that adds meaning to each parameter (e.g., 'filename: Aseprite file to modify', 'image_path: Image file to import'). This significantly aids understanding, though it could specify accepted file formats or path constraints.

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 ('Import'), the resource ('image file'), and the target ('into a layer of the sprite'), making the tool's purpose immediately obvious. It also mentions supported formats (PNG, etc.), which adds specificity.

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 says it's 'useful for bringing in reference images or composing pre-made parts' and notes it 'works best when the sprite is in RGB color mode', but does not explicitly state when to avoid using it or suggest alternatives among the many sibling tools (e.g., copy_region, draw_pixels).

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