search_sketchfab_models

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

With no annotations, the description carries the burden of behavioral disclosure. It mentions that the tool returns a formatted list of matching models, which is helpful, but it does not disclose whether it calls an external API, potential rate limits, pagination behavior, or error conditions. The read-only nature is implied by 'search' but not made explicit.

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 and front-loaded with the core purpose, followed by a clean bullet-style parameter list. Every sentence adds value and there is no redundant or filler content.

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 parameter documentation is complete, but the return value is only described as a 'formatted list', which is vague given that no output schema exists. Missing details include what fields each model entry contains, how categories combine, and what happens on errors or empty results. It is adequate for a basic search tool, but not fully 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 schema description coverage is 0%, but the description compensates fully by explaining every parameter: query text, comma-separated categories, maximum result count, and downloadable filtering. This goes well beyond the bare schema definitions and gives the agent actionable meaning.

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 the action ('Search for models on Sketchfab') and the resource, making the tool's purpose immediately understandable. It does not explicitly contrast itself with sibling tools, but the verb 'search' naturally distinguishes it from download, preview, and status tools.

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 opening sentence gives clear context for when to use the tool: to search Sketchfab for models. It does not provide explicit exclusions or alternatives, but the sibling tool names make it evident that this is the search step before downloading or previewing.

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