index_option_500etf_min_qvix

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

Annotations already disclose readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is well covered. The description adds the source URL and return type (pandas.DataFrame) but no additional behavioral traits like data delay, update frequency, or coverage limits. The description does not contradict the annotations, and given the annotation coverage, a mid-level score is appropriate.

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 compact but repetitive: the title '500 ETF 期权波动率指数 QVIX-分时' appears twice, in the first line and again in the ':return:' line. The URL and rtype lines add some value, but the redundancy suggests inefficient structure. It is still short and not verbose, so it avoids the lowest scores.

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 zero-parameter intraday index tool, the description names the data (QVIX for 500 ETF options) and the return type (pandas.DataFrame), but it does not specify columns, frequency, or any caveats. Since there is no output schema, the description carries the burden of explaining what to expect, and it falls short of fully doing so. The tool's simplicity makes it minimally adequate, but there are clear gaps.

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 input schema is an empty object with zero parameters, so schema coverage is trivially 100%. The description has no parameter-related responsibilities; the baseline for zero parameters is 4, and the description does not need to explain anything further. No parameter confusion exists.

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 identifies the tool as returning the 500 ETF options volatility index QVIX in intraday (分时) form, which matches the tool name's 'min' prefix and distinguishes it from the daily sibling index_option_500etf_qvix. However, it lacks an explicit verb (e.g., '获取' or '查询') and reads as a noun phrase with a URL and return type, so it is clear but not maximally explicit.

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 alternatives such as the daily QVIX tool (index_option_500etf_qvix) or other underlying indices (e.g., 300etf, 50etf). The description does not mention any conditions, exclusions, or comparative context, leaving the agent without selection criteria beyond the name.

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