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

No annotations are provided, so the description carries the full burden and does well: it discloses returned fields (change state, hash, metadata, HTTP/security context), the chaining output, a recommended polling cadence, and cost ($0.005 USDC on Base via x402). It leaves auth/payment mechanics, rate limits, and failure behavior unexplained.

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 front-loaded sentences with zero waste: purpose and return shape first, usage cadence second, cost last. Each sentence carries distinct information.

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?

Return values and cost are covered, which is useful given no output schema. But with five parameters at 0% schema coverage and no annotations, the description omits parameter meaning, payment/auth mechanics, and failure behavior, leaving meaningful gaps for a paid, chainable monitoring tool.

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, and it does not: none of the five parameters (url, selector, previous_hash, ignore_selectors, timeout_seconds) are explained. The 'previous_hash' / 'changed state' relationship and 'ignore_selectors' purpose are especially opaque without description support.

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 clearly states the verb and resource: a recurring webpage monitor that returns changed/unchanged state, current hash, metadata, and HTTP/security context. It names concrete use cases (prices, inventory, docs, policies, competitors). It distinguishes itself from detectWebpageChange and canonical-web-scrape mainly through the 'recurring' framing and next-request chaining, though it never explicitly names those siblings.

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?

It provides a clear usage context: scheduled polling about every 5 minutes, and implies chaining via the 'ready next request' output. It doesn't state when NOT to use it versus detectWebpageChange or web-reader, so sibling selection still relies on inference, but the polling cadence is actionable guidance.

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