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

The annotations already establish that this is a read-only, open-world tool. The description adds useful context: the data comes from SEC EDGAR, covers the latest fiscal year, and is free with no payment, but it does not clarify preview limitations, rate limits, or authentication behavior.

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 and front-loads the core purpose. It does contain redundant vendor branding and repeats the free/no-payment point, but the overall length is appropriate for a simple one-parameter tool.

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 read-only tool with one parameter and no output schema, the description covers the returned metrics, data source, fiscal-year scope, and accepted identifier types. Minor gaps remain around output formatting and CIK syntax, but nothing critical is missing for basic invocation.

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?

Although the schema has 0% description coverage for the single required parameter, the description compensates by saying the identifier can be a US ticker or CIK. It does not give format examples or explain CIK formatting, but it adds meaningful semantics beyond the bare string schema.

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 resource and fields: latest fiscal-year revenue and net income for a US ticker or CIK, sourced from SEC EDGAR. It is specific about what the tool returns, but it does not distinguish itself from the sibling get_financials tool.

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 indicates the tool is free and requires no payment, which implies a preview use case, but it does not explicitly say when to use this tool versus get_financials, get_comps, or other financial-data siblings. No exclusions or alternative-selection guidance is provided.

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