Authenticate in Safefy Payment

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

Annotations already indicate mutating (readOnlyHint=false), idempotent (idempotentHint=true), and non-destructive (destructiveHint=false) behavior. The description adds the concrete side effect of updating the access token, which is useful context. However, it does not disclose failure modes, whether old tokens are invalidated, or any rate limits. No contradiction with annotations.

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 consists of a single, front-loaded sentence with no filler or redundant information. It communicates the core action efficiently, and the structure is appropriate for a simple tool of this scope.

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?

The tool is simple with no parameters, but the description does not explain when authentication is required (e.g., before other API calls) or what the result looks like (no output schema). For a basic re-authentication action, the description is minimally adequate but leaves the agent without guidance on its role in the broader workflow.

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 has zero parameters, so the schema is trivially complete. There is no parameter information to explain, and the baseline for zero-parameter tools is 4. The description adds no unnecessary parameter details.

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 action: 'Faz login novamente na API e atualiza o token de acesso' (re-logs into the API and updates the access token). This is a specific verb+resource combination that is distinct from all sibling tools, which focus on data operations like listing, getting, or creating.

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?

No explicit when-to-use guidance is provided. The word 'novamente' (again) implies re-authentication but does not specify conditions such as token expiry or contrast with alternatives like configure_credentials. Usage is implied rather than explicitly stated.

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