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

Adds substantial behavior beyond annotations: no sign-in, zero starting credits, one-time token return, required storage and Authorization header usage, downstream 402 responses with checkoutUrl, pricing, and per-network daily key limits. These details materially help an agent understand the auth and billing flow.

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 compact and front-loaded: the free/no-sign-in bootstrap context comes first, followed by token handling, downstream paid-tool behavior, and rate limits. Every sentence adds useful operational context without waste.

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 one optional parameter, no output schema, and annotations covering safety hints, the description supplies everything an agent needs: why to call it, what it returns, how to use the token, and what happens when credits run out.

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 schema has 100% description coverage for the single optional `name` parameter, so the schema already carries parameter meaning. The description adds no additional guidance about the `name` field, which is acceptable but not enriched.

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 and resource: create a new AwesomeVideo API key. It also distinguishes itself from credit-purchase tools by emphasizing that it is free, requires no sign-in, and works without an existing key.

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?

Clearly establishes the bootstrap context: call this when no key exists, then store the returned token and use it as a Bearer token. It also explains the downstream 402/checkout behavior for paid tools. It does not explicitly name a sibling alternative or state when not to call it, which keeps it below a 5.

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