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

The annotations already establish readOnlyHint, openWorldHint, idempotentHint, and non-destructive behavior, so the description does not need to restate those. It adds output-scope detail about returning links to sitemap, docs, contact, and discovery documents, but no additional operational caveats such as rate limits or freshness. The description does not contradict the annotations.

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 one tight, front-loaded sentence that names the resource and then compactly enumerates the link categories it returns. There is no filler or redundancy with the title or schema.

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 zero-parameter, heavily annotated read-only tool, this is mostly adequate: it explains the general topic and what links the result includes. The main gap is that it does not clarify how site_info relates to read_page and search_pages, which matters for choosing correctly among sibling 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?

The tool takes zero parameters, confirmed by both the empty input schema and additionalProperties: false. With no parameters, there is no semantic burden for the description, and the schema completely defines the valid invocation.

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 identifies the target resource ('Black Water Window Cleaning (blackwaterwindowcleaning.com)') and the deliverable: an overview 'with links to its sitemap, docs, contact and every discovery document.' It is not a tautology, but it never explicitly contrasts with read_page or search_pages, so it stops short of a 5.

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 guidance about when to call site_info versus read_page or search_pages, and no exclusions or alternatives are named. The description only lists what the tool contains, leaving the agent to infer the intended entry-point role.

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