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

Annotations already declare read-only and idempotent hints, and the description adds that it requires payment, is not confidential, and involves LGPD responsibilities for the client, going beyond the structured annotations. No contradiction 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?

The description is a moderately sized block of text with several sentences covering purpose, hosting, payment, and legal aspects. It is not overly verbose, but some details like LGPD compliance could be considered background context rather than essential usage 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?

Given the single parameter and no output schema, the description should at least clarify the input and expected output. It explains the purpose and payment but omits any explanation of the registration number format or what the response will contain, leaving the agent with insufficient information for correct 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?

The schema has one required parameter 'inscricao' with zero description coverage. The description does not explain what 'inscricao' refers to or provide any format or meaning beyond the name, so the parameter semantics are not conveyed.

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 tool's purpose: to consult the registration in the Regional Council of Dentistry MA (Cro MA) from an official source. It uses a specific verb ('consultar') and resource ('cadastro') and distinguishes from siblings by naming the specific council and consultation type.

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?

The description explains it's a paid service using prepaid credit and is for official data, implying legitimate verification use. However, it doesn't provide explicit when-to-use or when-not-to-use guidance or mention alternatives, as siblings are unrelated.

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