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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds two genuinely new facts: only published reports are returned, and results are ordered newest-first. It says nothing about how limit/offset interact with that ordering or whether there is a total count.

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 sentence with no filler, front-loading the resource and the period options before the ordering note. Nothing is padded, though there is also nothing beyond that one clause.

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 read-only list tool with a complete annotation set and no output schema, the description covers the essentials of what is listed and in what order. It still leaves the agent guessing about the return shape (report titles? dates? identifiers?) and about pagination behavior across limit/offset.

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 description coverage is 0%, so the description must carry parameter meaning. It only restates the period enum values ('daily'/'weekly'), which the schema already enforces, and never touches limit or offset — no defaults, no max-page guidance, no indication of the ordering they page over.

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 gives a specific verb and resource ('列出已发布日报 daily 或周报 weekly') and adds the ordering ('从最新一期开始'), so an agent knows exactly what it returns. It does not, however, distinguish itself from the sibling get_report beyond the implied list-vs-detail split.

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 word '已发布' (published only) and the 'directory/catalog' framing imply this is the enumeration entry point, with get_report as the detail lookup, but that routing is never stated. There are no explicit when-to-use or when-not-to-use conditions.

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