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

Annotations exist (destructiveHint=true, readOnlyHint=false, openWorldHint=true), so the safety bar is lower, yet the description still adds real behavioral context: it discloses that calls consume SEO add-on credits and points to the top-up path. It does not explain the refresh flag or reconcile the conservative destructive/idempotency hints, leaving a gap for an operation that looks like a read.

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?

Front-loaded with what one row contains, then use cases, then per-parameter values. Every sentence carries information, though the middle sentence is a long comma run that could be tightened.

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?

An output schema exists, so return-field enumeration is partly redundant, but the description still supplies the credit-cost caveat, filter semantics, and use-case framing that structured fields lack. It is nearly complete; the undocumented refresh flag (presumably the credit-consuming crawl trigger) is the main omission.

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 the description must carry the parameter burden. It does explain allowed values for dofollow, status_type, order_by, and what from_domain filters, but leaves limit, target (the only required param), and refresh entirely undocumented — a substantial gap across 7 parameters.

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+resource+granularity: 'Individual backlinks, one row each', and explicitly distinguishes itself from the aggregate sibling by saying 'This is the raw link list'. An agent can tell it apart from seo_backlinks, seo_broken_backlinks, and seo_best_pages_by_links without opening any schema.

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?

Gives three concrete use cases: auditing a specific link, verifying a paid/earned link exists, and building a disavow candidate list. It does not name an explicit alternative tool or state when-not to use it, so it stops short of full routing guidance.

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