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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds only the domain-pinning scope constraint, which is genuinely useful, but says nothing about whether URLs are paged, cached, or how exhaustive the crawl is.

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?

A single front-loaded sentence with no filler, and the domain pin is informative rather than redundant. It is efficient, though it is arguably too terse for a tool with a categorical selector.

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?

An output schema exists, so return values need not be explained, and both parameters are fully documented in the schema. Still missing is how this differs from the sibling sitemaps tool and when an agent should reach for it, which matters given the dense cluster of near-identical sitemap tools.

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 100%, with the type enum values and limit bounds (default 50, max 250) fully documented in the schema. The description adds no syntax or default details beyond that, so the baseline 3 is appropriate.

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+resource (sitemap URL discovery) and pins the target domain, so an agent knows it returns URLs from Pristine Marketplace's sitemaps. However, it does not distinguish itself from the close sibling pristine_marketplace_sitemaps, leaving the sitemap-index vs. URL-list relationship ambiguous.

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?

There is no statement of when to use this tool versus alternatives, nor any prerequisite or context for choosing it. The only implicit cue is the pinned domain, which tells the agent nothing about when this is preferable to pristine_marketplace_sitemaps or the site's search tools.

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