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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions a cost, but does not disclose error behavior, success criteria, limits, authentication needs, or whether the extraction works on dynamic/JavaScript-rendered pages.

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 a single front-loaded sentence that communicates the core purpose and cost with zero wasted words. It earns its place.

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 the tool's simplicity (one parameter, no output schema, no annotations), the description provides the minimal essentials: input URL, output type, and cost. However, it lacks guidance on choosing between this and sibling scrapers, and it omits behavioral caveats that an agent would benefit from knowing.

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%, so the description must compensate. The phrase 'from web pages' clarifies that the single required 'url' parameter should point to a web page. This adds meaning beyond the schema's bare type string, but the description could still be more explicit about accepted URL formats or constraints.

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?

The description uses a specific verb ('Extracts') and identifies both the resource ('web pages') and the output format ('structured JSON data'). It is clear about what the tool does, though it does not explicitly distinguish itself from sibling web-scraping tools like web_scraper or browser_scraper.

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 implies when to use the tool: when structured JSON needs to be extracted from a web page. However, it gives no explicit guidance about when not to use it or which sibling tools might be better alternatives for other scraping or parsing needs.

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