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

No annotations are provided, so the description carries the full burden. It discloses the returned fields (title, issuing unit, document number, deadline, summary, link), which is useful, but does not state that this is a read-only operation, nor mention pagination or result-limit behavior. Adequate but with clear gaps for a no-annotation tool.

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 dense sentence that front-loads the domain and then the filters and return fields. It is efficient and well-ordered, though the return-field enumeration makes it slightly long for one sentence.

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 no output schema, the description usefully enumerates the return fields, and the filter parameters map to the documented schema. For a read-only search tool with no annotations, this covers most of what an agent needs, though read-only/pagination behavior remains unstated.

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 schema already documents all four parameters, including the default/max on limit. The description mirrors these filters (keyword, region, industry) without adding syntax, format, or matching-behavior detail, which is the correct baseline of 3.

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+resource (查询/search policy documents) and names the precise domain (海南自贸港及全国惠企政策情报) with the covered policy types. This clearly distinguishes it from the bidding/dev-service siblings, which operate in an entirely different domain.

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 implies usage by listing filter dimensions (keyword, region, industry), but never states when to use this versus alternatives or any exclusions. Since no sibling covers policy documents, the absence of routing guidance is not fatal, but nothing explicit is offered.

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