get_top_pages

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds genuine value by disclosing metric composition and that paths are normalized without query strings, but it says nothing about default result set size (limit=50), pagination behavior, or how the account/property_id resolution works when they are null.

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 clean sentence with no filler, and the metric list is front-loaded. However, for a 6-parameter tool with zero schema documentation, this level of terseness reads as under-specification rather than economy.

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, but the description leaves critical calling information missing: required date range semantics, how to scope to an account or property, and what limit/offset control. An agent would have to guess on nearly every non-required parameter.

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 0% across 6 parameters, so the description carries the full burden and does not meet it: limit, offset, account, property_id, start_date, and end_date are all undocumented in both places. The only semantic hint is the 'without query strings' note on path, which clarifies grouping rather than any parameter.

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 the exact metrics (page views, active users, engagement seconds) and the exact breakdown dimensions (hostname and path), which lets an agent distinguish it from siblings like get_events or get_traffic_sources. It is a noun phrase rather than a verb, and 'top' only appears in the tool name/title, so the ranking/ordering behavior is implied rather than stated.

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 and no mention of alternatives, even though run_report, get_summary, get_traffic_sources, and get_events all overlap in reporting GA4 data. It also never states that start_date and end_date are mandatory or what time zone/granularity they take.

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