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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered by structured data. The description adds the return content (nome, link e peixe) but nothing about auth, rate limits, or failure modes, so it earns only modest incremental credit.

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 compact sentences that front-load what is returned and then give the usage trigger. Nothing is padded, though the parenthetical URL/format is slightly redundant with the schema's own handle description.

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?

There is no output schema, and the description compensates by naming the returned fields (nome, link, peixe), which is helpful. What is missing is disambiguation from the very similar 'get_creator_tralha' sibling, which is essential context for correct tool selection here.

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 description coverage is 100% and there is a single required 'handle' parameter whose format ('com ou sem @') is already documented in the schema. The 'iscabox.com/@handle' in the description merely restates the handle concept, adding no syntax or constraint beyond the schema, so the baseline 3 applies.

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 states a specific resource (as tralhas publicadas por um criador de conteúdo de pesca na iscabox) and even enumerates the returned fields (nome, link e peixe), so the agent knows what this returns. The gap is sibling differentiation: 'get_creator_tralha' is a near-identical sibling and the description never clarifies how these two differ, leaving the agent to guess.

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?

It supplies a trigger condition ('Use quando o usuário perguntar pela tralha de um canal ou vídeo'), which is real usage guidance. However, it offers no when-not guidance and no routing to alternatives, which is a notable omission given the presence of the confusingly similar 'get_creator_tralha' and 'build_tralha' siblings.

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