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

Annotations declare readOnlyHint=false and destructiveHint=true, but the description presents this purely as a retrieval ('will provide you with the number of domains'), giving the agent no explanation of what the write/destructive aspect means in practice. Nothing is said about the live/synchronous nature, cost, or rate limits. With annotations already sparse and somewhat surprising for a summary query, the description adds no behavioral 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 front-loaded sentence with no filler, and the core output (domain counts by country/language) leads. It is efficient, though it largely restates the endpoint/title without adding differentiating detail.

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 not be explained, and the input schema is rich. But for a tool with 14+ similar siblings and surprising destructive annotations, the description is thin on selection guidance and behavioral expectations. It is minimally viable rather than complete.

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?

The description contributes nothing about parameters, but the nested body schema documents each field (mode, groups, filters, categories, technologies, technology_paths, internal_list_limit) in detail, including limits like 'up to 10'. Baseline 3 is appropriate when the schema carries the parameter burden, though the top-level 'body' wrapper itself is undocumented.

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?

The description names a specific verb+resource: it returns domain counts by country and language for specified technology names, groups, or categories. That is concrete and understandable. However, it does not distinguish this tool from close siblings such as post_dataforseo_domains_tech_aggregation_live or post_dataforseo_domains_tech_technology_stats_live, which sound nearly identical.

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?

There is no when-to-use guidance, no comparison to the many sibling endpoints, and no prerequisite or exclusion stated. The agent is left to infer entirely from the name which of the technology endpoints to pick. Nothing in the text routes the agent here rather than to aggregation_live or domains_by_technology_live.

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