currency_boc_sina

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, covering the safety profile. The description adds the data source and return type, but does not disclose rate limits, pagination, or column structure. 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 a compact docstring-style block with title, URL, parameters, and return type. It is front-loaded and efficient, though the long URL may be unnecessary for the agent.

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 simple query tool with 3 parameters and no output schema, the description covers parameter meanings and return type. However, it lacks date format clarification, column-level return details, and usage context relative to sibling tools, leaving some 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?

Schema description coverage is 0%, so the description is the main source of parameter meaning. It explains symbol as a choice of currencies and start_date/end_date as trading days, and mentions the DataFrame return. However, it does not specify the expected date format clearly; the URL example uses dashes while schema defaults use compact digits.

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 tool as a historical data query for Bank of China RMB exchange rates via Sina Finance, with a specific URL and parameter list. It specifies the resource and action, but does not explicitly differentiate from sibling currency tools like currency_boc_safe or currency_history.

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. It only states what it does, not when it should be preferred over the many sibling currency/forex tools.

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