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 a useful scope constraint by narrowing results to 公开发布 dynamics, but says nothing about pagination behavior, rate limits, or auth, and the output schema carries the return-value burden.

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?

Two compact sentences split by a semicolon: the primary action and accepted inputs come first, then the fallback route. No redundant or filler wording.

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?

With annotations, an output schema, and 100% schema coverage, the description supplies the one thing structured fields cannot: which entry point to use given what the previous step returned. Only pagination workflow guidance is absent, and the schema handles that.

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%, so both parameters are already fully documented, including the strict page_token pass-through rules. The description only echoes the accepted URL forms and the 'no video link' warning that the schema itself states, adding little beyond it.

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 and resource (获取公开发布动态列表) plus the accepted input forms (主页链接、短链接、分享文案). It also distinguishes the profile_url route from the by_user_id route, so an agent can tell which of the two sibling tools to pick.

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?

Gives a clear when-to-use context (you have a profile URL, short link, or share text) and an explicit exclusion (不要传视频链接) plus a redirect to the user_id entry point when a user_id is already known. It stops short of covering when to prefer the mirror tools for articles or videos, but the routing guidance is solid.

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