cn-last30days

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

With no annotations, the description must carry behavioral disclosure; it does indicate a query/search operation over a 30-day window across platforms. However, it does not describe return shape, result ordering, viral-content filtering semantics, pagination, or any limitations, so behavioral transparency is only partial.

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 no filler; every phrase contributes either scope or purpose.

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?

Adequate for a straightforward search tool: the required parameter is clear and all parameters have schema descriptions. However, with no output schema and no annotations, the description does not explain response format, supported platform codes, or behavior when start/end dates are omitted, leaving a moderate gap.

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 100%, so the baseline is 3. The description adds value by signaling the default temporal window (last 30 days) and the viral-content intent, which are not fully captured in the individual parameter descriptions.

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 names a specific action (search/query), a resource (multi-platform content), and an explicit temporal scope (last 30 days). The '跨平台' phrase clearly separates it from platform-specific siblings like douyin-search or xiaohongshu-search.

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 states the intended context: cross-platform, keyword-based, last-30-days viral-content search. It does not explicitly list when-not cases or alternatives, but the multi-platform and timeframe conditions give an agent enough signal to select this over single-platform siblings.

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