create_voice_from_preview

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

Annotations indicate non-destructive and open-world behavior. Description adds value by explicitly stating it makes an API call to ElevenLabs, which may incur costs. No contradictions with annotations.

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?

Two sentences plus a cost warning note. Front-loaded with purpose and key usage constraint. Every sentence serves a purpose.

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?

Description covers purpose, source of key parameter, and cost warning. Output schema exists to handle return value details. Minor gap: does not explain prerequisites like having a preview from `text_to_voice`.

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?

Input schema has 0% description coverage. Description adds meaning for `generated_voice_id` by linking to `text_to_voice`, but provides no guidance on `voice_name` or `voice_description`. Insufficient compensation for low schema coverage.

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?

Description clearly states the tool 'adds a generated voice to the voice library' and specifies it uses the voice ID from the `text_to_voice` tool. Verb and resource are specific, and the reference to a sibling distinguishes its purpose.

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 cost warning and instruction 'Only use when explicitly requested by the user' provide clear usage context. However, it does not explicitly list when not to use or name alternative tools.

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