Ase Set Layer Blend Mode

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

The description clearly states that this is a mutating 'set' operation and enumerates the valid mode values. With no annotations present, though, it does not disclose additional behavioral context such as whether the target layer must already exist, whether the operation is reversible, or how the change affects rendering/export. This is adequate but not rich.

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?

A single front-loaded sentence states the action and then gives the essential value list. There is no filler, no repeated title, and every part of the description earns its place.

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?

For a simple 3-parameter setter, the description plus self-explanatory parameter names provide enough to call the tool, and the presence of an output schema covers return-value expectations. It loses a point because it does not explicitly note that the mode list is exhaustive or provide guidance on how to source sprite_path and layer_name.

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 0%, so the description must compensate. It does for the mode parameter by listing all 19 legal values, but sprite_path and layer_name receive no additional explanation in either the schema or description. Their names are self-explanatory, so the gap is moderate rather than severe.

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 uses a specific verb ('Set') and a specific resource ('a layer's blend mode'), then lists every accepted mode. This unambiguously distinguishes it from sibling layer tools like ase_set_layer_opacity and ase_set_layer_visibility without needing to name them.

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?

Usage is implied: if an agent needs to assign a layer's blend mode, this is the tool. However, it does not explicitly contrast with alternatives, state prerequisites (e.g., layer must exist), or say when not to use it. The context is clear but not fully explicit.

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