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

Annotations already declare destructiveHint=true and readOnlyHint=false, but the description adds real behavioral value: the dry-run preview mode, the returned deletion receipt, and that the receipt is not retained. It also clarifies that the anonymous per-call count is out of scope, useful for understanding what is actually removed.

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?

Front-loaded with the core action and scope, then the confirmation semantics. Three compact sentences with the anonymous-count caveat being the only mildly tangential clause; overall efficient.

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 destructive, zero-annotation-safety-gap tool (annotations cover the safety profile) with no output schema, the description covers preview/deletion behavior, receipt return, and scope. Nothing critical for correct invocation 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?

Schema coverage is only 33% (only meu_id documented inline), so the description must compensate. It explains that item scopes deletion to a single record and that confirmar toggles preview vs actual deletion, covering the two undocumented parameters well.

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 verb ("Apaga") and resource ("tudo sob o seu id", or a single "item"), so the agent knows this is a scoped deletion tool. It doesn't name a sibling for contrast, but the delete/view/choose distinction against meus_dados_ver and meus_dados_escolher is inferable from the verb.

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?

Clearly describes the two-phase usage pattern: without confirmar=true it previews what would be deleted, with confirmar=true it actually deletes. This tells the agent how to safely invoke it, though it names no explicit alternative tool to use instead.

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