macro_china_bsi_index

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

The description adds the return type (pandas.DataFrame) and a data source URL, which is useful. Given that annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, the description does not need to restate safety, but it could disclose more about data content or behavior beyond simply returning the index.

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, but it is merely a concatenation of a title, a URL, and a return type. It avoids verbosity, but it is not a coherent, well-structured sentence that explains the tool clearly.

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 and no parameter details, the description should explain what the returned DataFrame contains (e.g., columns, frequency) and any other relevant context. It only provides the index name and a source URL, which is insufficient for an agent to fully interpret the result.

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 already reflects this (100% coverage). With no parameters to document, the description is not expected to add parameter information, so the baseline of 4 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 identifies the resource as '超灵便型船运价指数' (Supramax shipping freight index) and provides a source URL, but lacks an explicit verb like 'retrieve' or 'get.' It is distinct from sibling shipping indices by name, but doesn't differentiate beyond 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 given on when to use this tool versus alternatives. It does not state any exclusions, prerequisites, or preferred contexts, leaving the agent without enough information to select it over sibling shipping index tools.

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