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

Annotations already declare readOnlyHint=true and openWorldHint=true, covering the safety and external-data profile. The description adds that the tool returns metadata and body paragraphs, a modest behavioral detail, but doesn't mention pagination, truncation, or rate limits.

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, well-structured sentence that front-loads the resource and output. No unnecessary words; every part contributes.

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?

The tool is simple (one parameter, output schema exists), so the description needn't explain returns. However, with no usage guidance or parameter detail, it lacks the context an agent would need when choosing between this and sibling article-fetching tools.

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?

With only one parameter (url) and 0% schema description coverage, the description's mention of 'One public Punch article' implies a URL input but doesn't explain its format, validity criteria, or how to obtain it. Baseline 3 is appropriate given the schema's 0% coverage and the minimal contextual addition.

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 states a specific resource ('One public Punch article's metadata and body paragraphs'), making the tool's purpose clear. It distinguishes itself from sibling punch_news, punch_headlines, punch_sections, and punch_author by specifying a single article retrieval, though it doesn't explicitly name alternatives.

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?

The description gives no explicit when-to-use guidance, no mention of alternatives, and no exclusions. An agent must infer usage from the name and purpose alone.

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