pixelart_clear_canvas

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

Annotations already indicate destructiveHint=true and idempotentHint=true. The description adds that the background default is fully transparent and returns a confirmation string, but does not elaborate on side effects, permissions, or error conditions. It provides marginal value beyond annotations.

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 two sentences with a clear parameter list. It is efficient with no extraneous information, though the parameter list could be integrated more fluidly.

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?

The description covers the basic operation but does not mention error handling (e.g., what happens if canvas_id does not exist) or any return details beyond a confirmation string. Given the tool's simplicity, it is minimally complete.

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 input schema has description coverage at 0% (though background property has a description in schema). The tool description restates the parameters and default value but adds no new semantic detail beyond what the schema provides. A baseline score of 3 is appropriate given low coverage.

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 'Erase all drawing on a canvas back to a flat background color,' specifying the verb 'erase' and the resource 'canvas.' It distinguishes from sibling tools that perform more granular operations like setting pixels or drawing shapes.

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 only lists arguments but does not provide explicit guidance on when to use this tool versus alternatives, such as pixelart_delete_canvas or pixelart_duplicate_canvas. It lacks context for when-not-to-use or prerequisites.

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