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

With no annotations, the description carries the full burden, and it does add real behavioral value: it discloses the return format (markdown full text) and a non-obvious versioning rule (same-day reposts do not overwrite; the first sync of the day wins). It still omits error behavior for missing dates and the read-only nature is only implied by 取.

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 front-loaded sentence with a parenthetical caveat, no filler, and the resource named first. Every clause earns its place; it is about as tight as this tool needs.

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?

There is no output schema, and the description does state what comes back (full-text markdown), which covers the main return-value question. For a one-parameter read tool the remaining gaps (error/empty-date handling, explicit read-only framing) are minor.

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% and the schema itself documents the accepted date formats, so the description need not repeat them. However, the description adds nothing parameter-specific beyond the schema, so this sits at the baseline for fully-covered params.

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 (取/fetch) and a specific resource (single issue full-text markdown of the 每日 AIGC 早报). The word 单期 ('single issue') implicitly separates it from the sibling list_daily_issues, but no sibling is named explicitly, so the differentiation is only implied.

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 implies you call it to retrieve one issue's full text, and the sibling set contains an obvious list counterpart, but it never says when to use this vs. list_daily_issues or search_articles. No exclusions or prerequisites are given.

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