analytics_by_country

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

With no annotations, the description bears full responsibility for behavioral traits. It only states 'performance breakdown' without indicating read-only nature, data freshness, pagination, or that it returns metrics like clicks/impressions (implied by schema but not described).

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 a single, clear sentence without filler. However, it could include the siteUrl context without becoming verbose. Still, it is appropriately sized.

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?

Given no output schema, the description should outline what the response looks like (e.g., list of countries with metrics). It does not. The tool has 4 parameters, and while schema covers them, the description lacks completeness regarding output and usage context.

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 coverage is 100%, with each parameter having a clear description in the schema. The description adds no additional parameter insight beyond what the schema provides, so a baseline 3 is appropriate.

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 clearly states the tool returns a performance breakdown by country for a specified period, which distinguishes it from siblings like analytics_top_pages or analytics_traffic_sources. However, it does not explicitly mention that it operates per site (siteUrl required), which is inferred from the schema.

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 guidance is given on when to use this tool versus other analytics tools (e.g., analytics_top_pages, analytics_traffic_sources). The description simply states functionality without context on usage scenarios or alternatives.

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