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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered; the description usefully adds the 20-item bound, truncation signaling, and the important caveat that an empty list does not prove absence of answers. However, it never explains why the text says 'current rendered page' while the required parameter is an explicit pagePath, leaving a real behavioral ambiguity about scope. That addition is valuable but the unresolved scope conflict keeps this from a 4.

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?

Three sentences, front-loaded with the action and the bound, then filtering, then result semantics. The final sentence is long but carries non-obvious negative-result semantics, so it earns its place; only the restated 20-item limit is mildly redundant.

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-value detail need not be explained, and the description covers boundedness, filtering, and empty-result meaning. What is missing is resolution of the 'current rendered page' phrasing against the required pagePath parameter, which an agent would need to call this confidently.

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 limit, query and pagePath are all documented in the schema; the description largely restates the query filter and repeats the 20 cap already encoded as a maximum. It adds no syntax, matching semantics, or path-format detail beyond the schema's own examples, matching the baseline 3.

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 opens with a specific verb and resource ('Return ... FAQs extracted from the current rendered page') and states the hard cap of 20, which separates it from general search tools. It does not name or contrast any sibling (e.g. get_place_visit_facts), so an agent must still infer the boundary between page-level FAQ retrieval and other page projections.

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?

Usage is implied by the bounded-page framing and by the note that an optional query filters published Q&A text, which tells the agent when to pass a query. There is no explicit when-to-use versus when-to-use-an-alternative guidance, and no stated preconditions such as the page needing to be published or reachable.

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