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

Annotations already indicate readOnlyHint=false (mutation) and destructiveHint=false (not destructive). The description adds the 'deactivate' action but does not elaborate on behavioral traits like permissions required, reversibility, side effects, or error conditions. Bulk mention is a parameter detail. 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 is overly verbose and includes irrelevant general info about checkouts and other actions (create, get). It repeats the same info in different ways (Portuguese and English). The structure is inefficient; it should focus solely on the deactivate action. Less than ideal for an agent to parse quickly.

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?

Given the lack of output schema and poor parameter descriptions, the description is incomplete. It fails to explain what happens after deactivation (e.g., whether checkouts become unusable), required permissions, or return values. The agent lacks enough context to use the tool confidently.

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 0% and description only partially explains two parameters: checkout_id and checkout_ids. It mentions these accept IDs for deactivation and bulk support, but does not clarify account or checkout object. The checkout object is irrelevant for deactivation but still present in schema. Poor coverage of the 4 parameters.

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 'deactivate: inativa um checkout (checkout_id)' and mentions bulk support, so the core purpose is clear. However, the description begins with generic info about checkouts and lists all actions (create, get, deactivate), which dilutes focus and could confuse an agent. The '[Flattened action: deactivate]' line helps, but the purpose is not cleanly presented.

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 guidance on when to use this tool versus its siblings (e.g., pagseguro_checkouts_create, pagseguro_checkouts_get). The description does not indicate prerequisites, context, or exclusions. The only hint is that it accepts checkout_id or checkout_ids for deactivation, but this is implicit.

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