index_option_50etf_min_qvix

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

The description only adds that it returns a pandas.DataFrame; this is a minimal behavioral detail. It doesn't explain data source specifics, whether data is historical/realtime, or any side effects. The annotations already declare readOnlyHint=true and idempotentHint=true, so the description adds little beyond that. No contradiction with annotations exists.

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 short and includes a structured return type, but most content is redundant with the title and name. The URL is the only unique piece of information. While it's not bloated, the redundancy means it doesn't earn 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?

Given the large family of similar QVIX tools, the description fails to explain what 'min' indicates (likely minute-level data) or how this differs from index_option_50etf_qvix. It also doesn't specify the data range or update frequency. The provided URL is unexplained and may be a data source but lacks context. This leaves the tool insufficiently distinguished for safe agent use.

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 zero parameters, and the schema is empty. The description correctly implies there are no inputs to worry about. Since there are no parameters, the baseline is 4, and the description doesn't need to provide parameter details.

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 simply restates the tool name in Chinese ('50 ETF 期权波动率指数 QVIX') and provides a URL and return type. It does not explicitly state an action like 'fetch' or 'query,' and the purpose is largely inferred from the name. This is a tautology rather than a clear functional 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?

There is no guidance on when to use this tool versus sibling tools such as index_option_50etf_qvix (without 'min') or other index_option_*_qvix variants. The description doesn't mention use cases, prerequisites, or alternatives, leaving the agent without any context for selection.

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