stock_sgt_reference_exchange_rate_szse

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

Annotations already declare the tool as read-only, idempotent, and non-destructive. The description adds the source URL and return type (pandas.DataFrame), which is useful but does not disclose additional behavioral traits like data freshness, frequency, or potential error conditions. 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 very short, with a title line, URL, and return type. The URL and return type are valuable, but the title line is redundant with the tool name. It is concise and front-loaded, but the redundant title prevents a perfect score.

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 should explain what data is returned. It only says '参考汇率' (reference exchange rate) and 'pandas.DataFrame', without specifying the currency pair, the date range, or the DataFrame columns. This ambiguity makes it hard for an agent to know what to expect, especially when choosing between SZSE and SSE variants.

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 has zero parameters, so the baseline is 4. There are no parameters to describe, and the description does not need to add parameter-level semantics. The schema coverage is 100% since there are no properties.

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 main description line '深港通-港股通业务信息-参考汇率' is a noun phrase that restates the tool name in Chinese, with no action verb like 'get' or 'fetch'. The URL and :return: lines indicate the source and data type but still do not clearly state what the tool does. It fails to differentiate from the sibling stock_sgt_reference_exchange_rate_sse beyond the 'szse' in the name.

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?

No guidance is provided on when to use this tool versus alternatives such as the SSE counterpart or settlement exchange rate tools. The description lacks explicit context about SZSE-specific applicability or any exclusions, leaving the agent to infer usage solely from the tool name.

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