nex_captcha_buy

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

It adds substantial behavior beyond the annotations: charging occurs at the current server price, the schema is rechecked before charging, only a solution is returned, the local id must be kept instead of upstream taskId, unclear outcomes require reconciliation before retry, and there is a 3-attempt cap per resource flow. These details are consistent with destructiveHint=true and idempotentHint=false.

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 purpose and key constraints are front-loaded, and nearly every sentence carries operational value. It is dense and packs multiple safety, billing, and retry rules into one paragraph, so it is effective but slightly harder to scan than a more structured version.

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, billable, non-idempotent tool with no output schema, it covers the critical usage, charging, retry, and output-identity concerns. The main remaining gap is that productCode semantics and the exact returned solution shape are not described, though the schema reference partially compensates.

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 coverage is 0%, so the description must carry parameter meaning. It helpfully says the adapter must match nex_captcha_product_schema, is an object, and must not contain platform API keys, but it does not explain productCode or the adapter fields beyond pointing to the schema tool.

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?

It states a specific verb and resource: create a standalone CAPTCHA recognition task from challenge inputs matching nex_captcha_product_schema. It immediately distinguishes the tool from page-CAPTCHA siblings by saying it only returns a solution and never submits to the website.

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 description gives explicit when-to-use and when-not-to-use guidance: call it directly when the user's task needs it, use browser CAPTCHA tools for page CAPTCHAs, never use it to bypass an unsupported page adapter or substitute GRID, and treat a price inquiry as not a purchase request. It also sets retry limits and a reconciliation step before retry.

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