flip_layer

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

No annotations are provided, so the description must disclose behavioral traits. It does not state whether the operation is destructive (replaces original cel), reversible, or affects only the specified frame. It also doesn't indicate if any additional side effects occur (e.g., updating composite). For a mutation tool with zero annotation coverage, this is a significant gap.

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, succinct sentence that front-loads the action. It is appropriately sized for a simple operation and contains no filler. However, the conciseness sacrifices necessary detail, so it is not perfect.

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 annotations, output schema, and parameter descriptions, the tool description is incomplete. An agent would not know how to correctly construct arguments or what to expect after execution. The description covers only the core action but omits essential context like parameter identification and side effects, making it inadequate for a 4-parameter tool.

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, and the description fails to compensate. It only mentions the 'direction' parameter implicitly via 'horizontally or vertically', but it does not explain the roles of filename, layer_name, and frame_index, which identify the sprite, layer, and frame. Since the schema itself provides no descriptions, the tool description must fill this gap, and it doesn't.

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 states a specific action: flipping a layer cel horizontally or vertically. It clearly identifies the resource (layer cel) and the operation (flip). It distinguishes from siblings like rotate_layer (rotation) and set_cel_position (positioning) by implying mirroring. However, it doesn't explicitly contrast with other mirroring tools (none exist), so it's clear but not exhaustive.

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?

No guidance is provided on when to use this tool versus alternatives. The description does not mention prerequisites (e.g., does the sprite need to be loaded? Does the layer need to exist?) or scenarios where flipping is appropriate. It is a bare statement with no context for selection.

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