set_color_mode

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

With no annotations, the description carries full burden for behavioral transparency. It only states 'Convert the sprite's color mode' without indicating side effects (e.g., whether it modifies the file in place), reversibility, required permissions, or any limitations. The allowed modes are listed but not explained in terms of consequences.

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 followed by a parameter list. It is front-loaded with the core purpose and contains zero extraneous words. Every part is necessary and directly relevant.

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 conversion tool with two required parameters and no output schema, the description covers the essential purpose and parameter meanings. However, it lacks information about return values (e.g., success indication), whether the sprite is directly modified, and any prerequisites (e.g., file must exist). It is adequate but not thorough.

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, so the description must add meaning. It explains 'filename: Aseprite file to modify' and 'mode: "rgb", "grayscale", or "indexed"'. This provides concrete allowed values for mode, which is a significant improvement over the raw schema that only specifies 'string'. The filename explanation is basic but sufficient.

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 starts with 'Convert the sprite's color mode', which clearly identifies the action (convert) and resource (sprite's color mode). It further specifies the allowed modes ('rgb', 'grayscale', or 'indexed'), making the purpose precise and distinguishing it from other color manipulation siblings like adjust_hsl or quantize_to_palette.

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. It doesn't mention that this tool should be used to switch the color mode of a sprite, nor does it exclude cases where other tools (e.g., quantize_to_palette) would be more appropriate. The context for usage is only implied by the tool name.

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