list_icon_styles

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

There are no annotations, so the description carries the behavioral disclosure burden. It clearly indicates a read-only 'Return' operation and names the content categories returned, which is transparent for a simple listing tool. However, it does not mention output format, ordering, or potential size, but these are not critical for a no-parameter list operation.

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 with no filler. It front-loads the action ('Return') and immediately enumerates the concrete output categories, making every word 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?

For a no-parameter, informational listing tool without an output schema, the description adequately states what the agent will receive. It could additionally hint that these returned values are meant to be used with the sibling generate tools, but that is optional rather than necessary for a correct call.

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 tool has zero parameters)Skip so there is nothing for the description to clarify about inputs. The baseline for no-parameter tools is 4, and the description appropriately avoids inventing parameter details that do not exist.

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 ('Return'), names the resource ('available styles, shapes, and default palette values'), and clearly indicates a listing operation that is distinct from the sibling generate tools. However, it does not explicitly differentiate itself from those siblings by name or state what it is not, so it falls just short of a 5.

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 gives no guidance on when to use this tool versus the sibling generation tools. There is no stated precondition, no 'use this before generating icons' context, and no exclusion of alternatives, so the agent must infer its role from the tool name and sibling names.

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