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

With annotations already declaring readOnlyHint=true and openWorldHint=true, the description adds meaningful behavioral context: missing evidence is explicit, there is no language filter, estimates are not Google Ads metrics, results persist in call history, and seven-day freshness rules apply. However, some sentences are cryptic or irrelevant ('Prices remain unapproved') and the async/task behavior ('One fixed Live task') is unexplained, reducing clarity.

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?

The description is short but poorly structured as a series of disjointed fragments with no clear front-loading. Sentences such as 'Prices remain unapproved' appear irrelevant to the tool's core purpose and do not earn their place. The result reads like internal release notes rather than agent-facing guidance.

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 data-retrieval tool with one parameter and no output schema, the description lacks essential context: what 'distribution' means, what output is returned, and how results should be interpreted. The behavioral notes are incomplete and confusing, leaving significant gaps for correct invocation.

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 says nothing about the single required 'keywords' parameter, including its 1–20 item limit or per-item character constraints. Even though the schema contains an item-level description, the tool description does not compensate for the reported 0% top-level schema description coverage. The agent gets no semantic help from the description about what to pass.

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 is a fragmented noun phrase ('clickstream country distribution') with no clear verb or statement of what the tool actually returns. It does not distinguish this tool from the sibling nexscope_seo_clickstream_search_volume, which likely overlaps in purpose. An agent must infer the function from the name and title alone.

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 explicit guidance on when to use this tool versus alternatives, no prerequisites, and no exclusions. Phrases like 'no language filter' and 'one fixed Live task' are scoping constraints, not usage guidance. The agent is left to guess the appropriate context.

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