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

Annotations already declare readOnly, idempotent, non-destructive and closed-world behavior, so the safety profile is covered. The description adds genuinely new behavioral context the annotations cannot express — that the call is free and does not consume credits — which matters for a credit-metered product. It does not describe the return format, but the credit/cost disclosure is the salient extra trait here.

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?

A single sentence that front-loads the covered topics and closes with the cost attribute. Every clause earns its place; there is no filler or repetition of the title.

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 zero-parameter, zero-output informational tool with annotations covering the safety profile, the description is complete enough to invoke correctly. The only minor gap is that it doesn't indicate the nature or language of the returned content, but nothing essential to calling it 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?

The tool takes zero parameters, so the schema has nothing to document and the baseline of 4 applies. No parameter explanation is needed or expected, and none of the description's content conflicts with the empty 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 names the resource (Firmoscop) and enumerates exactly what the tool returns: what Firmoscop is, how verdicts are interpreted, and how credits are obtained. This is a clear, specific informational purpose that an agent can distinguish from the operational siblings (cauta_firma, verifica_firma, prospecteaza_firme), though it never explicitly contrasts itself with them.

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?

Usage is only implied: the 'free, consumes no credits' note signals this is a safe, zero-cost call an agent can make freely, and the content list implies it is for orientation before using the other tools. There is no explicit statement of when to call this versus the sibling tools or any prerequisites.

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