draw_circle

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

No annotations exist, so the description must disclose behavioral traits. It only states the action without mentioning side effects (e.g., file modification, overwriting, or required canvas state). This leaves the agent unaware of potential destructive or state-changing behavior.

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 structured as a Python docstring with a header and argument list, avoiding unnecessary detail. Each line serves a purpose, though the header is minimal and could be slightly more informative.

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?

Lacking output schema and annotations, the description does not explain what happens after drawing (e.g., file saving, return value) or any required prerequisites. This leaves crucial gaps for an agent executing the 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 input schema has 0% description coverage, so the description compensates well by providing brief but clear explanations for each parameter (e.g., 'Name of the Aseprite file to modify', 'X coordinate of circle center'). These add meaning beyond just names and types.

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 'Draw a circle on the canvas,' which clearly identifies the action and resource. However, it does not differentiate from the sibling tool 'draw_circle_at', which could cause confusion about when to use which.

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, nor any prerequisites or exclusions. The description is purely imperative without contextual advice.

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