Load CAD model

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

The description adds context beyond the annotations by specifying that loading a model also brings its editable parametric definition and render mesh. It does not mention failure modes or permissions, but the readOnlyHint and destructiveHint annotations already cover safety, so the added detail about what is loaded is valuable and non-contradictory.

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 that clearly states the action and the objects involved. It is efficient and well-structured, with no unnecessary words or repetition. Every part of the sentence contributes meaning.

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 simple tool with one parameter and no output schema, the description is mostly complete: it states the action, the resource, and the returned/loaded components (model, parametric definition, mesh). The lack of usage guidance and error behavior is a minor gap, but the annotations and simple schema cover the essential safety and input constraints, making the description sufficient.

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 single parameter modelId is not described in the text or in the schema description (0% coverage), but the description's phrase 'a saved CAD model' gives minimal semantic context that modelId identifies an existing model. The schema's format and pattern already provide validation rules, so the description adds little beyond confirming the parameter's role, which is a modest contribution.

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 tool loads a saved CAD model, its editable parametric definition, and render mesh. This uses a specific verb ('Load') and resource ('saved CAD model'), and the mention of parametric definition and render mesh distinguishes it from sibling tools like list_models (which likely lists metadata) or create_model (which creates new models).

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 provides no explicit guidance on when to use this tool versus alternatives. It only states what the tool does, without mentioning context, exclusions, or alternative tools. Sibling tools like list_models and update_model exist, but the description does not explain how load_model differs in usage or when to prefer it.

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