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

With no annotations, the description carries the full burden of behavioral disclosure. It adds minimal context (TTM, based on most recent financial report) but omits critical behaviors: how the bulk selection works (since the schema has no parameters), whether it returns data for all stocks, pagination, or required authentication.

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 single sentence that is relatively concise and includes useful information about ratio categories. Some promotional language ('offers an efficient way') adds minor fluff but does not significantly harm clarity.

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 lacks essential context for a bulk endpoint: it does not explain what set of stocks it covers, how it is invoked without parameters, or how it differs from the non-bulk sibling. Since there is no output schema or annotations, the description should provide more operational details, but it falls short.

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 is effectively empty. The baseline for 0 parameters is 4, and the description does not need to add parameter details. It does add context about the types of ratios returned, though that is more about output than parameters.

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 that the tool retrieves trailing twelve months (TTM) financial ratios for stocks, listing the ratio categories. However, it does not explicitly distinguish this bulk tool from the sibling 'getFinancialRatiosTTM' (non-bulk), so it lacks sibling differentiation.

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 bulk endpoint versus the single-stock variants (e.g., getFinancialRatiosTTM). The description merely describes what it does without mentioning use cases, exclusions, or alternatives.

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