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

Annotations indicate readOnlyHint=false and destructiveHint=false, which are consistent with a mutation that is not destructive. The description adds 'gera cobrança, mexe em dinheiro' (generates charges, messes with money), providing behavioral context beyond annotations. However, it lacks details on side effects like whether adding a plan creates immediate charges or modifies existing subscriptions.

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 verbose and includes irrelevant actions (create, add_offer, etc.) that do not belong to this tool. It could be a single sentence specifying this tool's function. The extraneous content wastes tokens and introduces confusion.

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 complexity of a mutation affecting payment links (money), and the absence of output schema or parameter descriptions, the description is incomplete. It does not explain what a plan is, what the response looks like, or potential errors. The agent lacks sufficient information to invoke the tool correctly.

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 mentions payment_link_ucode and data for add_plan, but does not explain the structure or required fields of the data object. The schema shows additionalProperties: true for data, so the description should guide the agent on valid keys; it fails to do so, leaving the parameter semantics underdefined.

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 lists multiple actions (create, add_offer, add_plan, charge_offer, charge_value) and states '[Flattened action: add_plan]', implying this tool is for add_plan only. However, the description does not clearly and exclusively state that the tool adds a plan to a payment link; it is muddled by extraneous actions. This ambiguity makes it difficult for an agent to discern the specific purpose.

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?

The description provides no guidance on when to use this tool versus siblings like hotmart_payment_links_write_add_offer or hotmart_payment_links_write_charge_offer. It does not mention prerequisites, conditions, or alternatives, leaving the agent without decision-making context.

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