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

With no annotations present, the description carries most of the behavioral disclosure burden. It does disclose the premium tier requirement and the JSON array return format, but it omits important details such as whether parameters can be omitted, how filters combine, pagination behavior, or other error conditions beyond 403.

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 well-structured and readable, with a clear title, access note, Args list, and Returns list. However, the Args section duplicates the input schema verbatim, adding redundancy and length without new information.

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 access requirements, parameter formats, and return fields, and the schema handles individual parameters. Still, it lacks guidance on which parameter combinations are valid, the meaning of all parameters being optional, and the partial enum for report_type, which could leave an agent uncertain when constructing a call.

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 100%, and the parameter descriptions in the schema exactly match the Args section. The description adds no additional semantic meaning beyond what the schema already provides, so it does not push above the baseline.

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 providing cash flow statement financial data and lists the return fields, making the resource and scope evident. However, it lacks an explicit verb such as 'retrieve' or 'query', and it does not explicitly differentiate itself from sibling tools like income or balance_sheet.

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?

There is no guidance on when to use this tool versus alternatives. The only contextual note is the PRO+ subscription requirement and the 403 response for lower tiers, which is an access constraint rather than a usage guideline.

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