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

Annotations already declare readOnlyHint and openWorldHint, so safety and scope are covered structurally. The description adds useful provenance ('public Moxie search surface') and confirms results are matching story records, but says nothing about pagination behavior or result ordering, which is relevant for a search tool.

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?

Two tight sentences with the core purpose front-loaded and the scope caveat second; no filler. Slightly dense, packing source provenance and the routing rule into one clause.

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. However, with 0% parameter coverage and an unexplained 'type' parameter, the description is not complete enough to let an agent call this confidently without guessing.

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%, so the description carries the full burden. 'Query and optional pagination' loosely maps to q and start, but the 'type' parameter is never mentioned and 'start' is never clarified as offset vs page, leaving two of three parameters semantically undefined.

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?

States a specific verb (Search) and resource (Fox News articles) plus a scope note that it targets Fox News coverage, which cleanly separates it from the many general web search siblings. It does not, however, distinguish itself from the other Fox News siblings (foxnews_headlines, foxnews_news, foxnews_article).

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?

Gives an explicit exclusion — 'use this for Fox News coverage, not general web search' — which is a real routing rule against bing_search/brave_search/etc. It stops short of naming Fox-specific alternatives like foxnews_headlines, so the within-domain routing is left to inference.

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