stock_sgt_reference_exchange_rate_sse

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

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint=false, so the safety profile is covered. The description adds that the return type is pandas.DataFrame and includes the source URL, but does not disclose any additional behavioral traits such as data freshness, column contents, or potential network dependencies beyond what annotations already imply.

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: a title line, a source URL, and return type documentation. Every piece of content serves a purpose, and there is no redundant filler.

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 tool's simplicity (no parameters, read-only), the description is mostly sufficient, but the absence of an output schema means the description should more explicitly explain what the returned DataFrame contains (e.g., currency pairs, buy/sell rates, or timestamps). The current description only says '参考汇率' without detailing columns or how these rates are computed.

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, so the schema description coverage is 100% by nature. There is nothing for the description to add about parameter meanings; the baseline of 4 for zero-parameter tools 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?

The description clearly identifies the resource as '参考汇率' (reference exchange rate) for the Shanghai-Hong Kong Stock Connect on SSE, with a source URL. It distinguishes from sibling tools like stock_sgt_settlement_exchange_rate_sse and stock_sgt_reference_exchange_rate_szse through the 'reference' and 'sse' qualifiers, though it lacks an explicit action verb such as 'get' or 'list'.

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. It does not mention that reference rates differ from settlement rates, nor does it point to SSE versus SZSE variants, so an agent cannot tell which tool fits based on the description alone.

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