fetchJuejinArticle

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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and destructiveHint false, covering the safety profile. The description adds 'full article content' as a slight behavioral qualifier, suggesting it returns the whole article rather than a snippet, but it does not disclose output format, failure behavior, or handling of invalid URLs.

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?

The description is a single sentence with no filler. Every word contributes: verb, resource, and source format. It is front-loaded and immediately tells the agent what the tool does.

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 simple one-parameter tool with safety annotations, the description covers what it does and the target URL type. However, there is no output schema, and the description does not clarify whether the returned content is markdown, HTML, or plain text, leaving some ambiguity about the return contract.

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?

The input schema only defines a generic uri string with 0% description coverage. The description meaningfully narrows this by specifying the URL must be a Juejin post URL, which is valuable context the schema lacks. For a single parameter, this is sufficient compensation for the coverage gap.

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?

Description clearly states the verb 'Fetch' + resource 'full article content' + target 'Juejin post URL'. It is unambiguous about the operation and platform, and the platform reference implicitly separates it from siblings like fetchCsdnArticle and fetchGithubReadme. It does not explicitly differentiate itself from the broader fetchWebContent tool but still makes the scope clear.

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 establishes a clear context: use this when targeting a Juejin post URL. It does not explicitly state when not to use it nor name alternatives, leaving the agent to infer the distinction from sibling tool names and the platform mention.

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