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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description usefully adds what the result summarizes (link count, referring domains, rank) and how workspace scoping behaves, but says nothing about cost, latency, or freshness of DataForSEO data.

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 short sentences, main capability front-loaded before the workspace note. No filler, though the workspace clarification is appended without punctuation structure separating parameter docs from the tool summary.

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 values need no elaboration, and both parameters are at least addressed. What remains thin is the relationship to adjacent backlink tools, but for a simple two-parameter read tool this is close to sufficient.

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 carries weight: it explains that workspace is a customer slug and optional when only one workspace exists. However, 'domain' is only implied by 'einer Domain' — no format or subdomain/path expectations are given.

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 clearly that it returns the backlink profile of a domain with link count, referring domains, and rank — a specific resource plus the metrics returned. It implicitly separates itself from dfs_backlinks_list (individual links) and dfs_backlink_competitors, but never names those siblings 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?

The only explicit guidance is for the workspace parameter ('optional bei nur einem Workspace'). There is no stated condition for choosing this summary over dfs_backlinks_list or dfs_backlink_competitors; the agent must infer that from the word 'summary' and the listed metrics.

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