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

Annotations already declare readOnlyHint=false, destructiveHint=false, openWorldHint=false, so the safety profile is covered. The description adds only the vague notion of 'start tracking' and says nothing about duplicates, required permissions, or what side effects creating a tracked backlink has. With annotations carrying the burden, a 2 reflects minimal added context.

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?

A single sentence, front-loaded with the action and immediately clarifying the two URL parameters. No filler, though it is arguably too terse for a 15-parameter tool.

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 15-param, 5-required mutation tool with no output schema and 0% schema coverage, the description is far too thin. An agent cannot know the semantics of most required fields or the return behavior from the description.

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% across 15 parameters, so the schema explains nothing. The description clarifies only 2 of the 15 (sourceUrl, targetUrl) and is silent on required params like projectId, siteId, source, and the pricing/category/rel fields. It fails to compensate for the coverage gap.

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?

A clear verb+resource ('Start tracking a backlink') with an added gloss clarifying what sourceUrl and targetUrl mean in the link relationship. It reads distinct from check_backlink (verification) and list_backlinks (enumeration), but it never explicitly names or rules out those siblings, so it stops short of 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?

No when-to-use guidance at all. Given the dense sibling set (check_backlink, create_backlink_submission, close_backlink, update_backlink_task), the description gives the agent no criteria for choosing this tool over the alternatives.

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