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

Goes well beyond the readOnlyHint/openWorldHint annotations by disclosing that the feed is public with no key, that only latest posts are returned, and that access is metered at $0.002 USDC per successful call via x402 with failures uncharged — a material cost/auth fact an agent must know. It stops short of describing result ordering, pagination, or how the payment handshake is triggered.

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-loads the resource and filter scope, then sibling routing, then pricing — a sensible priority order with no filler. The pricing clause is dense (x402, three chains) but every element is decision-relevant.

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 two-optional-parameter read tool with a full schema, full parameter coverage, and an output schema that handles return values, the description is close to complete. The only unresolved point is the mechanics of the paid-call flow, which an agent may need before invoking.

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 100%, so baseline is 3, but the description adds meaning: it clarifies that the keyword filter matches title, summary, AND categories, whereas the schema only mentions title/summary. That extra match surface materially changes how an agent should phrase `q`, though the `limit` parameter gets no added context.

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 resource (WordPress.org news posts from the official WordPress news RSS feed) and the retrieval mode (keyword filter on title/summary/categories, latest posts only). An agent can distinguish it from the ~60 sibling news/search tools without opening the schema.

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?

Explicitly routes to two named siblings (search_ap_news_articles, search_bbc_news_articles) with the condition that selects them. It does not address closer generic alternatives such as search_google_news or search_news_across_the_web, and gives no guidance on when NOT to use this feed.

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