verify_backlink

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

With no annotations present, the description carries the full disclosure burden. It does well on the side-effect front by stating 'Updates any matching tracker entry', which warns of a mutation inside an otherwise read-looking tool, and it previews the returned data. It says nothing about whether a live network fetch occurs, authentication requirements, rate limits, or what happens when the source page is unreachable or the schema target is malformed.

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?

One compact sentence covers the purpose and inspected facets, with the side effect appended as a second short clause. It is front-loaded and free of filler, though the enumeration of facets slightly buries the tracker-update warning that matters most for safe invocation.

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 two-parameter check tool with no output schema, the description adequately covers what it evaluates and even names the data returned. The notable omission is the mutation semantics of the tracker update and any failure-mode behavior, which matter because no annotations are supplied to signal safety.

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 0%, so both required parameters are undocumented in the schema. The description partially compensates by framing the operation as 'a page' linking to 'your domain', which implies source_url is the page to fetch and target_domain is the domain to look for. It does not specify expected formats, such as whether scheme/path is permitted in source_url or whether target_domain should include a protocol or subdomain.

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 and resource plus the exact facets it inspects (anchor text, rel attributes, target URL, indexability), so an agent knows what comes back. It does not differentiate itself from the closely related sibling recheck_live_links, which is the main remaining gap.

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?

Usage is only implied: it checks a specific page-to-domain link relationship, which contrasts implicitly with site-wide tools like scan_site or seo_link_audit. There is no explicit 'use this when...' statement and no guidance on when recheck_live_links would be the better choice.

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