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 the fixed host scope, which is useful context, but says nothing about pagination, sitemap-section behavior, or how the 250-entry cap interacts with discovery.

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 tight sentence front-loads the action and the pinned domain. It is efficient, though the parenthetical could carry slightly more value about what 'discovery' returns.

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-value explanation is unnecessary, and the schema is fully documented. Still, for a sitemap-enumeration tool with a sibling sitemap-index tool, the description omits the section-selection context that would make the entry point unambiguous.

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% with both parameters fully documented, including allowed enum-like values and the default/max for limit. The description adds no parameter detail beyond the schema, so the baseline 3 applies.

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 and resource ('sitemap URL discovery') and pins the exact base domain, which is useful given hundreds of similarly-named domain tools. It does not, however, distinguish itself from the closely related sibling ohpolly_sitemaps (sitemap index), which an agent would need to differentiate.

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?

No guidance on when to use this versus ohpolly_sitemaps, ohpolly_pages, or ohpolly_products. The agent must infer that this tool enumerates raw URLs from sitemaps rather than browsing structured catalog data.

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