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

With no annotations the description carries the full burden, and it delivers real behavioral facts: hard cap of 5 rows, first page only, no pagination input, per-call cost of 0.011 USDC, and explicit caveats that empty results are not a safety finding and no completeness/safety guarantee is offered. That is genuinely beyond what a bare schema would convey, though return format and permission needs remain unstated.

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 text is bloated with redundant disclaimers: "does not independently attest entity identity or completeness" is later restated as "No completeness or safety guarantee," and "One selected Chinese company data tool call" adds nothing. The actual purpose ("Recorded mini applications") is front-loaded but immediately buried under caveats and a schema pointer.

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 single-parameter list tool with no output schema or annotations, the description covers the important operational facts: prerequisite ID source, row/pagination limits, cost, and result caveats. Return field details are omitted, but the pointer to get_cn_data_tool_schema and the explicit disclaimers keep it adequate for correct invocation.

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 schema is an opaque 'arguments' object (0% coverage, additionalProperties true), so the description must compensate. It partly does by naming the required key input (Jinghai company_id, sourced from cn_data_v3_company_detail) and pointing to get_cn_data_tool_schema("v3_minapp_list") for the rest, but the full argument set is left to an external lookup.

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 the resource (mini applications) and the pagination notes ("provider first page only, at most 5 rows") make clear this is a listing/retrieval operation, distinguishable from the sibling cn_data_v3_minapp_detail. However, it never uses an explicit verb and does not contrast itself against the detail sibling, so it stops short of a 5.

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?

It states a concrete prerequisite ("Requires the Jinghai company_id from cn_data_v3_company_detail") and notes that additional pages require separate requests, which is useful context. But there is no explicit when-to-use/when-not guidance or direction to alternatives such as minapp_detail, so usage is only implied.

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