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

Annotations already establish readOnly, idempotent, non-destructive, closed-world behavior, so the safety profile needs no restating. The description instead spends its words on what each row contains — booked USD payout versus original amount/currency, error text, and the full request URL including domain, path and parameters — which is meaningful added context since no output schema exists. It stops short of explaining ordering, pagination behavior, or default window, keeping it below a 5.

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?

One dense sentence with zero filler, front-loaded with the 'incoming postback log' framing before the field list. It is a fragment without an explicit verb, which slightly weakens readability but costs no 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?

With eight parameters, no output schema, and only partial schema descriptions, the definition should say more about filtering and result shape. It adequately describes row contents but omits pagination defaults, ordering, and which filters are combinable, so an agent can call it but not optimize the call.

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 a middling 63%, and the description only touches filter semantics indirectly by explaining the status values and the meaning of the `url` field. It says nothing about period/date_from/date_to interplay, click_id or campaign filtering, or limit/offset paging, leaving the undocumented remainder to the schema.

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 names the resource precisely — an incoming postback log of what the affiliate network actually sent — and enumerates the outcomes (success / error / duplicate). The word 'Incoming' implicitly separates it from the sibling list_outgoing_postbacks, though it never names that sibling explicitly.

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 when-to-use guidance, no stated prerequisites, and no mention of alternatives such as list_outgoing_postbacks or list_conversions when reconciling traffic. An agent must infer the debugging/reconciliation use case entirely from the field list.

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