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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds only the upstream endpoint mapping (GET /v1/disponiveis), which is mildly useful for traceability but discloses no behavioral traits such as pagination limits, auth requirements, or what an account record contains.

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 short sentences with the resource definition front-loaded; nothing is buried. The second sentence is largely a restatement of the endpoint slug and earns only marginal space.

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 simple optional-parameter list tool the description is serviceable, and the schema covers the inputs. With no output schema, however, the description leaves the shape of a returned account record entirely unexplained, which an agent must guess before using the results.

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 all three parameters (page, filtro, orderBy) are documented inline, so the baseline of 3 applies. The description contributes nothing beyond the schema, notably not explaining what fields 'filtro' searches over for this particular resource.

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 (List) and a precisely qualified resource: 'cash boxes and bank accounts (disponiveis)'. The parenthetical disambiguates 'accounts' from the sibling egestor_list_users, and no other sibling lists financial accounts, so the tool is trivially distinguishable.

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 explicit when-to-use or when-not-to-use statement, but usage is implied unambiguously because no sibling exposes this resource. For a single-purpose read-only list endpoint, the absence of exclusions costs little, yet the description still adds nothing about prerequisites or alternatives.

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