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

Annotations are all false (readOnly=false, idempotent=false, etc.), indicating a mutating create operation. The description adds the prerequisite context but does not disclose additional behaviors like whether it permanently stores the voice, any auth requirements, or error scenarios. It is not contradictory, but it does not go beyond the basic action.

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 succinct, just two sentences, with the action stated first and the prerequisite second. No filler or redundant information.

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?

Given the lack of output schema and 0% schema coverage, the description only partially covers necessary context. It explains the main flow and prerequisite but omits details on other parameters, response structure, and potential side effects. More information would be needed for complete guidance, particularly for the non-required parameters and expected return value.

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 0%, so the description must compensate for parameter meaning. It only explains generated_voice_id and how to obtain it. Other parameters like voice_name, voice_description, labels, account, and played_not_selected_voice_ids are left unexplained, leaving significant ambiguity for the agent.

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 verb and resource: 'Create A New Voice From Voice Preview' and explains that it creates a voice from a previously generated preview. It distinguishes from other creation tools by specifying the prerequisite generated_voice_id and pointing to specific prior endpoints.

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 explicitly states when to use this tool: after fetching a generated_voice_id via the specified endpoints. It also names the alternative endpoints (design and remix) which are the prerequisites, giving clear context. However, it does not explicitly state when not to use it, though the prerequisite implies that.

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