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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds one useful behavioral fact — that this retrieves publicly accessible articles ('public'), implying no auth — but says nothing about paywalls, rate limits, or retrieval failure modes.

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 short sentence with the scoping word 'one' front-loaded and no filler. It is efficient, though its brevity contributes to the missing guidance noted elsewhere.

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 is not required, and the tool is a simple single-item fetch. Still, with zero schema coverage on url and no usage guidance, the definition is only minimally complete for an agent that must supply a correctly formatted URL.

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 0%, so the schema does not document the lone url parameter at all. The description names the concept (an article) but never states the expected URL format (full canonical URL vs. slug), leaving the only param partially ambiguous. Baseline 3 applies given only one self-evident 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?

Identifies the resource precisely ('one public Newsweek article') and distinguishes the scope from siblings like newsweek_headlines or newsweek_news by specifying a single article and its metadata plus body paragraphs. However, it is a noun phrase with no verb, so the operation (fetch/retrieve by URL) 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 or when-not-to-use guidance, and no alternative tool is named. The required url parameter weakly implies 'pass an article URL,' but the agent gets no help choosing this over newsweek_headlines, newsweek_news, or newsweek_author.

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