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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered. The description adds that the source is a public static JSON endpoint, which is useful context, but it says nothing about rate limits, failure modes, or page types returned beyond what annotations and the output schema convey.

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?

Two tight sentences with no filler, and the core action plus its scope are front-loaded before the discovery hint. 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?

For a single-parameter read tool with a full input schema, an output schema covering return values, and annotations covering the safety profile, nothing an agent needs to call it correctly is missing.

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 100%, so the baseline is 3. The description goes somewhat further by showing the handle's role in the path template `/pages/{handle}.json`, confirming it is a URL slug rather than an ID, which adds real meaning over the schema's 'Static page handle (URL slug)' text.

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 names a specific verb (Fetch), a precise resource (one SKIMS static storefront page), and a scope (by handle), and even discloses the backing endpoint `/pages/{handle}.json`. This clearly separates it from sibling skims_pages, which only lists handles.

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 routes the agent explicitly: use skims_pages to discover handles, use this tool to fetch a single page. That gives a clear use condition and names the alternative, though there is no explicit 'when not to use' statement.

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