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

With no annotations, the description carries the full burden and does well: it discloses that there is no independent attestation of entity identity, freshness, completeness, or compliance, that the record id is matched exactly but not attested to the company, and it states the per-call cost. Missing details about return shape, but the disclosure standard is met.

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?

Purpose is front-loaded, but the body piles on hedged disclaimers with noticeable redundancy — 'No completeness or safety guarantee' repeats an earlier 'no ... completeness ... or safety certification.' The value density is lowered by this repetition.

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 an opaque, single-argument detail tool with no output schema and no annotations, the description covers the key gaps: prerequisite source of record_id, exact-match caveat, cost, pagination, and a pointer to the schema tool. Only the concrete argument format is left unaddressed.

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 0% and the single 'arguments' object is fully opaque (additionalProperties: true), so the description must compensate. It names record_id as required via the sibling list and points to get_cn_data_tool_schema('v3_standard_detail') for the true schema, but it does not describe the field's format or any other accepted arguments.

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 Chinese opener '查询单条企业标准详情' states a specific verb and resource (query a single company-standard record), clearly distinguishing it from siblings cn_data_v3_standard_list and cn_data_v3_standard_count. It is clear enough for an agent to identify it as the detail-fetch counterpart, though it does not explicitly name those siblings.

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 the prerequisite explicitly: 'Requires record_id from cn_data_v3_standard_list; acquiring that list is a separate call,' which routes the agent to the correct sequence. It also covers pagination ('Additional pages require separate requests') and pricing. It stops short of explicit when-not-to-use guidance, hence a 4.

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