download_sketchfab_model

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

No annotations are provided, so the description carries full responsibility. It discloses scaling behavior (largest dimension equals target_size), return message details, and access rights requirement. This is strong, though it omits potential failure modes or side effects beyond the access condition.

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 well-structured: a clear one-sentence purpose, a scaling note, and a parameter list with examples. Every sentence contributes value, and no fluff is present.

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 essential aspects: what the tool does, how to use it (params), what to expect (scaled model, return message), and requirements (access rights). It would benefit from mentioning common failure modes or clarifying the import side effects, but it is largely complete for an agent to invoke it correctly.

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 description explains uid and target_size with detailed examples and semantics, far exceeding the empty schema. However, it completely ignores user_prompt, which is a third parameter present in the schema, so not all parameters are covered.

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 ('Download and import') and resource ('Sketchfab model') and identifies the unique key ('by its UID'), clearly distinguishing it from sibling tools like search_sketchfab_models or get_sketchfab_model_preview.

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 clearly conveys the context for use: when you have a UID and want to import the model. It does not explicitly mention when not to use it or alternatives, but the purpose is unambiguous enough that an agent can infer when to call it.

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