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

No annotations exist, so the description carries the full burden. It does disclose genuinely useful behavior the schema cannot convey: a $0.05 USDC payment on Base (eip155:8453) via x402, and the 'public page' access constraint. It omits error behavior, rate limits, and what happens to non-public/JS-rendered pages, which are meaningful gaps for a paid extraction tool.

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 short fragments with no filler, and the core purpose is front-loaded before the cost and parameter notes. Slightly telegraphic, but every clause 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?

With no annotations, no output schema, and 0% schema description coverage, the description should do more. It covers cost and the maxChars ceiling but says nothing about the return shape, failure modes on non-public pages, or pagination/truncation behavior when maxChars clips content.

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 for two parameters. It restates maxChars bounds (1–12000) that the schema already enforces via minimum/maximum, and only loosely qualifies url as a 'public page'. No URL format, scheme, or example is given, so the coverage gap is not closed.

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: 'Main readable text from one public page.' The 'one public page' scope distinguishes it from batch_meta, but the description never names page_meta or any sibling explicitly, so the agent must infer the boundary itself.

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?

Usage is only implied. The 'one public page' phrasing hints that batch/multi-page work belongs to a sibling, but there is no explicit when-to-use, when-not-to-use, or named alternative (page_meta, batch_meta, link_graph).

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