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

Annotations already declare readOnlyHint=true, idempotentHint=true and openWorldHint=false, so the safety profile is covered. The description adds one useful behavioral detail — only published clients are returned — but says nothing about return volume, pagination, or whether unpublished clients can be retrieved at all.

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 short sentence with no filler, and the scope qualifier is placed where it belongs. It is arguably under-specified rather than over-long, but from a pure conciseness standpoint it wastes nothing.

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, read-only listing tool with annotations and no output schema, the description is minimally sufficient to call correctly. It still leaves open what a 'cliente' record contains and how large the result set is, which matters for an agent deciding whether to call it.

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 baseline of 4 applies; there is no parameter semantics for the description to explain. The 'publicados' filter is fixed rather than parameterized, which is consistent 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?

States a specific verb and resource ('Lista todos os clientes Scrypta') plus a scope qualifier ('publicados'), so an agent knows this returns the published client list. It does not, however, differentiate itself from the sibling listing tools (listar_categorias, listar_planos, buscar_produtos), relying on the tool name alone for that.

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?

There is no guidance on when to use this versus buscar_produtos or the other listar_* siblings, and no exclusions or prerequisites stated. The agent must infer from the name that this is the client-listing tool.

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