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

With no annotations provided, the description carries the full burden and does so well: it discloses download/validate/re-encode steps, human review before publishing, the CC0 dedication requirement, file size and triangle limits, texture constraints, and the need for the user's API key. No contradictions with annotations exist.

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 four tight sentences that front-load the core action and then add constraints in order of importance. Every sentence adds a meaningful fact, with no filler or repetition of schema boilerplate.

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?

Despite having 11 parameters and no output schema, the description covers the essential operational context: source format, hosting requirement, processing pipeline, human review, license/legal caveat, and size limits. Combined with the rich schema descriptions for required fields, an agent has enough information to invoke the tool 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?

Schema description coverage is 73%, and the schema already explains most parameters. The description adds useful constraints for the URL parameter (public HTTPS, .glb, max 25 MB, 1M triangles, embedded textures only) and reinforces the CC0/attestation requirement, but it does not systematically address all parameters. It is adequate but not transformative beyond the schema.

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 a specific action ('Submit a .glb hosted at a public https URL on the user's behalf') and a clear resource (a hosted .glb asset). It also distinguishes itself from sibling upload/submit tools by emphasizing the URL-based submission flow and the human review pipeline.

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?

It clearly implies when to use the tool: when the asset is already hosted at a public HTTPS URL and needs to be submitted on behalf of a user with their API key. It does not explicitly name alternatives like get_upload_url/finalize_upload or state when not to use it, but the context is strong enough for an agent to select it.

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