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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, and the description's 'leitura' aligns with those. It adds useful context beyond annotations: supported actions, valid section values, and bulk execution via product_ids/offer_ids/marketplace_ids. This is meaningful behavioral disclosure for an annotation-backed read tool.

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 terse and information-dense with no fluff, which is good. However, the long list of actions and the unclear 'Flattened action' note make the structure confusing; a clear separation of 'this action' versus 'related actions' would improve usefulness without adding bulk.

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?

This is a complex tool with 12 optional params, no output schema, and many sibling tools, yet the description omits output/return behavior, how the active action is selected, pagination/limit behavior, and any required precondition or authorization context. The bulk-support note and section enum help, but the overall picture is incomplete.

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%, so the description must compensate. It does map several params to actions (e.g., list uses name/type/marketplace_id/is_hidden/cursor, get uses product_id, checkout_options uses product_id+section). However, many params like account and the array fields are not semantically explained beyond 'bulk support,' leaving important gaps.

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 says 'Produtos e ofertas no Guru (leitura)' and lists many actions, but it never clearly states that this tool is specifically for subscription options. The '[Flattened action: subscription_options]' note contradicts the broad action list, making the tool's actual purpose ambiguous and poorly distinguished from siblings like guru_products_offer_subscription_options.

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 or when-not-to-use guidance is given. The description implies read-only product/offer operations and mentions bulk support, but it does not tell the agent when to choose this tool over the many similar sibling tools or which action applies to this specific invocation.

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