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

No annotations are provided, so the description carries the full disclosure burden. It usefully reveals the returned content (address, navigation coordinates, region) and the fuzzy/province-browsing behavior, but says nothing about result limits, pagination, or completeness of the index — meaningful gaps for a lookup tool with zero annotation coverage.

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 clauses with zero filler: the first front-loads purpose, scope, and return fields; the second handles sibling differentiation. Every phrase earns its place.

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 and no annotations, the description does disclose what the tool returns and its search modes, which is the critical missing piece. It remains slightly incomplete on result volume/pagination behavior, but for a 2-optional-param read-only lookup it is largely sufficient.

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 both q and prov are already documented in the schema, including the example keywords. The description only restates the lookup axes (名称/属地) at a high level, adding no syntax, format, or interaction detail beyond the schema. Baseline 3 applies.

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 (查询), a concrete resource (全国看守所), the lookup keys (名称或属地), and the returned fields (地址、导航坐标、所属地区). It also explicitly distinguishes itself from the sibling sifa_lookup, so an agent can route between them without opening either schema.

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 names the alternative (sifa_lookup 的 kanshousuo) and states the distinguishing capability — dedicated index with fuzzy search and per-province browsing — which implies when to prefer it. It stops short of an explicit when-not rule or trigger phrasing, so it is clear context without full exclusion guidance.

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