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 pinned domain as extra context; it says nothing about how many URLs/entries come back or how the discovery is scoped beyond the schema's limit.

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 short sentence with zero filler, and the pinned domain is front-loaded. It is efficient, though its brevity edges into under-specification rather than crisp completeness.

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?

The tool has an output schema and full parameter documentation, so return values needn't be described. Still, for a read-only discovery tool sharing a near-identical sibling, the description is minimal and leaves the sitemaps-vs-sitemap_urls distinction unexplained.

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 both 'type' (enum-like list of sections) and 'limit' fully documented in the schema. The description adds no additional parameter meaning, 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 (discovery) and resource (sitemap URLs) and pins the target domain, which is useful. However, it does not distinguish itself from the sibling kyliecosmetics_sitemaps, leaving the agent to guess which one lists sitemaps versus extracts URLs from them.

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 when-to-use guidance, no condition selecting it over kyliecosmetics_sitemaps, and no mention of prerequisites. The only context is the pinned domain, which is useful but not usage guidance.

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