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

Annotations already declare readOnly, idempotent, openWorld and non-destructive, so the safety profile is covered. The description adds genuinely non-obvious behavior: pay-per-call pricing ($0.01 via x402/USDC on Base, no account needed), newest-first ordering, RON currency, and the empty-list case when no filings exist. Return detail is left to the output schema, which exists.

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?

Two sentences, front-loaded with cost and an explicit use-case trigger, followed by the field inventory. Dense but every clause carries information; the long field enumeration risks being a read-out of the output schema, though it does usefully signal scope.

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 paid, single-parameter, read-only lookup with a documented output schema, the description covers cost and payment mechanics, trigger condition, unit/currency, ordering, and the empty-result case. Nothing an agent needs to call it correctly is missing.

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?

Single parameter with 100% schema coverage, and the schema description already explains the CUI/CIF format and the RO-prefix variant. The description adds only the 'per year, newest first' framing, which is about output ordering rather than parameter meaning. Baseline 3 is appropriate when the schema does the heavy lifting.

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?

States a specific resource (Romanian company financial statements / bilanț ANAF), keyed by CUI and broken out per year, and enumerates the actual fields returned (turnover, profit, employees, debts, equity, Altman Z', ratios). An agent can distinguish it from romania_company_full_report or romania_company_risk_kyb without opening a schema.

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?

Gives an explicit trigger condition ('Use when you need revenue, profit, debt or headcount trends or a solvency view over several years') and routes the agent to romania_company_search for obtaining the CUI. It does not explicitly say when to prefer this over sibling tools like romania_company_full_report or risk_kyb, so it stops short of full when-not guidance.

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