sw_index_first_info

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds the source URL and return type (pandas.DataFrame) but no additional behavioral traits such as rate limits, data scope, or network dependencies. It does not contradict annotations.

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 description is extremely concise, with only a title, URL, and return type. It is front-loaded and has no fluff. However, it reads more like a docstring fragment than a coherent description, but it earns its brevity.

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 read-only, no-parameter tool with good annotations, the description is adequate but lacks detail about the returned data structure. It only states '分类' (classification) and pandas.DataFrame, leaving the agent unaware of specific columns or content. This is a minimal but acceptable description for a simple classification listing.

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 tool has 0 parameters, so the schema fully covers parameter semantics. Per the rubric, a 0-parameter tool gets a baseline of 4, and the description does not need to add any parameter information.

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 clearly identifies the resource as '乐咕乐股-申万一级-分类' (LeGuLeGu Shenwan Level 1 Classification) and provides the exact URL. The tool name also reinforces the purpose. However, it lacks an explicit verb like 'retrieves' and does not directly distinguish itself from sibling tools within the description.

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 provides no guidance on when to use this tool versus alternatives, no prerequisites, and no exclusions. It only states the source and return type, leaving the agent to infer usage context.

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