voicestudio_create_upload

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

With destructiveHint=true already declared, the description adds real context: the URL is one-use and signed, a persistent file slot is created, and remote clients require PUBLIC_BASE_URL. It never explains why the operation is flagged destructive (slot creation/consumption), so a 5 is not warranted.

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 tight sentences, front-loaded with the operation and its return artifact (file_id), then the follow-up step, then the environment prerequisite. No filler.

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 2-parameter creation tool with no output schema, the description covers the workflow, the signing/reuse constraint, and the env requirement, and it names file_id as the handoff value. The remaining gap is that neither input parameter's semantics are addressed.

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% and neither 'filename' nor 'mime_type' is explained in the description. The only hint is the enumeration of media kinds, which loosely maps to mime_type; the required filename parameter and any naming/format constraints are undocumented in both places.

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?

States a specific verb+resource: 'Create a file slot and a one-use signed PUT URL', plus the accepted media kinds (audio, video, manuscript, subtitle). It does not explicitly name voicestudio_upload_base64 as the contrasting sibling, but 'direct ... Send raw file bytes' implicitly distinguishes it from the base64 path.

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?

Gives a clear two-step usage recipe: PUT raw bytes to the returned URL, then reference file_id in API multipart fields, plus a deployment prerequisite (PUBLIC_BASE_URL for remote clients). It lacks an explicit when-to-use-this-vs-upload_base64 statement or any exclusions, so it stops short of a 5.

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