create_icon

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

No annotations are provided, so the description bears the full burden of disclosing behavior. It only states that an icon is created, without mentioning side effects, where the node is placed, whether it replaces the current selection, or whether parentId is required for placement.

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, focused sentence with no filler or repetition. It is concise and front-loaded, though it is brief to the point of omitting useful context.

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 creation tool with four parameters, no output schema, and no annotations, the description is insufficiently complete. It does not explain where the icon is created, how parentId is used, what the default behavior is, or what result the agent should expect.

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 100%, so the schema already documents the icon, size, color, and parentId parameters. The description adds little beyond the word 'built-in set,' which aligns with the icon parameter's allowed names, but this is not a meaningful semantic addition.

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 ('Create') and resource ('common UI icon from built-in set'), which clearly distinguishes this from sibling tools like create_vector or create_svg_node that build custom shapes. It could be more explicit about what qualifies as 'built-in,' but the core purpose is clear.

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 about when to use this tool versus alternatives such as create_vector, create_svg_node, or create_arrow. The phrase 'from built-in set' weakly implies a constraint, but there is no explicit when-to-use or when-not-to-use guidance.

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