erase_color

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

No annotations are provided, so the description carries full responsibility for behavioral disclosure. It explains the core effect but fails to mention that it modifies the sprite in-place, whether the operation is irreversible, or any potential side effects like affecting other layers or frames. The tolerance parameter's effect is implied but not fully described.

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 concise with one purpose sentence followed by a parameter list. It avoids fluff and is easy to scan. However, it could benefit from a brief note on return values or side effects without significantly increasing length.

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 absence of annotations and output schema, the description is incomplete. It does not specify the return value (if any), whether the tool modifies the file directly, error conditions, or if it works on the current cel only. For a mutation tool with 5 parameters, more context is needed for reliable use.

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 compensates well by explaining each parameter in the Args list. It provides an example for color (e.g., '#FF00FF') and states the default and range for tolerance (0-255). This adds meaning beyond the schema's bare property names.

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 'Make all pixels of a given color transparent (like a magic eraser).' This provides a specific verb ('erase') and resource ('pixels of a given color'), effectively distinguishing it from sibling tools like replace_color or fill_area.

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 offers no guidance on when to use this tool versus alternatives like replace_color or erase_region. It does not specify prerequisites, context, or situations where this tool is preferred over others.

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