Get Visitors by Hostname

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

No annotations are present, so the description carries the burden. It discloses that results are grouped by hostname and include counts and revenue, but it does not describe aggregation defaults, pagination, or read-only guarantees beyond the 'get' verb.

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 sentence that is front-loaded with the action and resource, and the parenthetical adds practical value without waste.

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?

The description is adequate for basic invocation but not comprehensive. With 23 parameters, no annotations, and no output schema, it leaves out response shape, date-range behavior, and how filters affect the hostname-grouped results.

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 100%, so baseline is 3. The description adds that 'hostname' is the breakdown dimension, but does not clarify how the optional `hostname` filter parameter interacts with that breakdown or other defaults.

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 'visitor counts and revenue broken down by hostname,' which names both the resource and the grouping dimension. This differentiates it from sibling analytics tools like get_pages or get_countries.

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 parenthetical 'useful for multi-domain tracking' gives clear context for when this hostname breakdown is appropriate. It does not explicitly name alternatives or exclusions, but alongside sibling tools the use case is evident.

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