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

Annotations already declare readOnlyHint=false, openWorldHint=false and destructiveHint=false, so the agent knows this is a non-destructive, closed-world write. The description adds only the duplicate-detection purpose; it omits that an import is typically a long-running job, whether it is idempotent/re-runnable, and what happens to already-imported backlinks. Adequate but thin against 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?

A single front-loaded sentence with no filler, and the core action leads. It is efficiently sized, though arguably too terse for a mutation tool that needs more operational context.

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 write operation with no output schema and two undocumented parameters, the description should explain the async/status workflow (the get_backlink_inventory_status sibling exists) and parameter meaning. As written, an agent cannot fully determine how to invoke it or what to do next.

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?

Both parameters (projectId, siteId) are required with 0% schema description coverage, and the description mentions neither. It gives no hint about what a site ID vs project ID selects or their expected format, so it fails to compensate for the schema 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?

States a specific verb (import) and resource (the website's existing backlinks) plus the goal (duplicate detection), which is more than the title alone conveys. It distinguishes the operation from sibling start_competitor_backlink_discovery by scoping to "the website's" own backlinks, though it never names a sibling explicitly.

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 or when-not-to-use guidance. The description does not reference the clearly related sibling get_backlink_inventory_status for tracking the import, nor clarify how it differs from start_competitor_backlink_discovery or list_backlinks. The agent is left to infer the trigger condition.

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