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

Annotations already declare the safe read-only, non-open-world profile. The description adds value beyond them by specifying the returned content (type, description, loaded page count, main pages), which matters since there is no output schema. It does not discuss pagination or freshness, but for a read-only overview that gap is minor.

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?

Three short sentences, front-loaded with the return summary before the usage note. The duplicated domain in parentheses is mild redundancy but nothing is wasted.

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 no-param, no-output-schema tool with safety annotations already present, the description covers purpose, return content, and usage timing. It is essentially complete; only explicit sibling routing is absent.

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?

Zero parameters, so the baseline is 4. The description correctly signals the tool takes no input by framing it as a fixed-site lookup back to the hardcoded domain.

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?

Specific verb+resource: it returns an overview of a named site (logue-vintage.com), enumerating what the overview contains (type, description, page count, main pages). This clearly distinguishes it from page-level siblings like get_page and list_pages, though it does not name those siblings explicitly.

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?

"最初にサイトの全体像をつかみたいときに使います" gives a clear triggering condition — use first to grasp the site as a whole. It does not name alternative tools or state when not to use it, so it stops short of full when/when-not guidance.

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