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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered. The description still adds real beyond-schema context: the deletion propagates to ElevenLabs (external side effect) and consumes/returns a clone slot, plus a cost note ('Free'). It stops short of stating irreversibility or what happens if the voice is currently in use.

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?

Three very short sentences, the core action front-loaded, and each fragment carries distinct information (scope, external propagation, slot effect, cost). Nothing is padded.

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 destructive operation with no output schema, the definition covers the key consequence but omits reversibility, failure conditions (e.g., voice in use by an active job), and any confirmation/idempotency nuance beyond the annotation flag. Adequate but with clear gaps.

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% for the single required voiceId parameter, so the description carries the full burden and does not meet it — no format, source, or lookup hint is given. The only implicit signal is 'one of your voices', which weakly constrains it to owned voices.

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?

Specific verb 'Delete' plus resource 'voice', with an explicit scope qualifier ('one of YOUR voices'). The parenthetical that the underlying clone is 'removed from ElevenLabs too' distinguishes it from sibling tools like get_voice/list_voices/create_voice_clone and tells the agent the deletion propagates to an external provider.

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?

'Frees a clone slot' implies the motivation for using it, but there is no explicit when-to-use / when-not-to-use guidance and no named alternative (e.g., create_voice_clone / list_voices) that would help an agent route correctly. Usage is inferable rather than stated.

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