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

With no annotations, the description carries the full burden. It usefully discloses the default period (last 28 days) and that the tool is 'Free,' plus the AI Search channel and shipped-work dimension behavior, but it never states read-only status, permissions, pagination, or return shape.

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?

Front-loaded with the core action, followed by an informative enumeration of reports and key defaults. The report list is long but each item earns its place as the primary input value set; the two explanatory sentences add real value.

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 9-parameter read tool with no output schema, the description covers the report enum and date defaults but is thin on the non-report parameters (filters, limit, metric, interval) and gives no sense of the returned data shape.

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 56%, so the schema already documents several params (to, from, metric, compare, interval). The description maps to the report enum and default period but adds nothing about filters, limit, compare, or metric semantics, leaving the gap only partially compensated.

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 states a specific verb and resource: 'Run any report on the site's traffic,' and names the available report types matching the enum. It is clearly distinct from most siblings, though it never explicitly contrasts itself with adjacent tools like visibility or goals.

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 when-to-use or when-not-to-use guidance, and no alternative sibling is named. The list of report types implies what can be requested, but the agent is left to infer selection criteria on its own.

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