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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, covering the safety profile. The description adds useful behavioral context by specifying the exact return content (titles and URLs) and the meaning of different URL path prefixes, which goes beyond what the annotations provide.

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?

The description is compact and front-loaded, leading with the core behavior and then adding category details and a usage note. The URL path enumeration is somewhat dense but earns its place by clarifying what the returned pages will contain. No filler or redundant phrasing is present.

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 simple two-parameter list tool with no output schema, the description covers the return shape, the page categories, and the intended use case. It does not mention ordering or pagination behavior, but the schema already provides limit/offset constraints, so nothing critical 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?

The schema description coverage is 0%, and the description does not mention the limit or offset parameters at all. The parameter names and schema constraints are fairly self-explanatory, but the description fails to compensate for the lack of schema descriptions, so an agent gets no guidance on how pagination works in this tool.

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 that the tool returns a list of page titles and URLs for the 'SEO対策研究室' site, and it enumerates the URL path categories. It does not explicitly differentiate itself from sibling tools like search or search_pages, but the verb '返します' and resource scope make the purpose unambiguous.

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?

The description gives a clear usage context: '分野ごとに記事をまとめて紹介したいときに使います' (use when you want to introduce articles grouped by field). It does not mention when not to use it or name alternative tools, but the stated use case is sufficient for basic selection.

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