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

Annotations already declare readOnly, idempotent, openWorld and non-destructive, so safety is covered. The description adds genuinely new behaviour: the Bing Webmaster Tools connection requirement, and a fallback where an empty list yields the site's total inbound links from crawl figures. That fallback is exactly the kind of non-obvious edge case an agent needs.

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?

Two dense sentences with no filler, front-loading the resource before the prerequisite and the fallback caveat. The second sentence packs prerequisite and edge case tidily, though the single long sentence is slightly heavy to parse.

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 3-parameter read-only tool with no output schema, the description covers what comes back (top pages, per-page linking sources with anchor text), the auth prerequisite, and the empty-result behaviour. Nothing material for correct invocation 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?

Schema coverage is 100%, so all three parameters are already documented, including the default/max for limit. The description only restates the page parameter's effect (who links to that page, with anchor text), adding little 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?

The description states a specific resource (inbound links Bing knows) and enumerates the two return modes: top-linked pages for a site, and linking outside pages with anchor text for one page. It identifies the Bing Webmaster Tools data source, which separates it from generic page_links or GSC siblings, but never names or contrasts with those siblings directly.

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?

It gives one hard prerequisite ("Needs Bing Webmaster Tools connected") and the two modes are inferable from which parameter is supplied. However, there is no explicit when-to-use/when-not guidance and no pointer to an alternative tool for overlapping jobs like page_links or gsc_* backlink style data.

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