macro_cons_opec_month

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

Beyond the annotations (readOnly, idempotent, non-destructive), the description discloses important behaviors: returns previous month's data, only includes countries with available data, and explicitly removes Ecuador from March 2020 onward. It also specifies the return type as pandas.DataFrame, which the annotations do not provide.

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 reasonably concise, front-loading the purpose and including only relevant behavioral details. The fix note for Ecuador and the source URL add useful context but slightly reduce structure quality; overall it stays compact.

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?

The description covers the essential aspects: date range, data lag, country filtering, historical fix, source URL, and return type. Since there is no output schema, the specification of a pandas DataFrame return suffices for a no-parameter read-only tool, though column details are not documented.

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 100% schema coverage, so the baseline is 4. The description adds contextual meaning by explaining the data range and return type, though it does not elaborate on parameters (none exist).

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 states the tool returns the OPEC monthly report with a specific date range (20170118-present). The verb '返回' (returns) and resource specification distinguish it from the many other macro tools in the sibling 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?

It provides context about the data range and the behavioral nuance that the index date corresponds to the previous month's data. However, it does not explicitly specify when to use this tool over alternatives; it is implied by the unique OPEC report scope.

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