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

The readOnlyHint annotation already covers the safety profile, and the description adds a useful behavioral detail: refunds are included with a negative amount. It also names the underlying Bookeo endpoint, which helps confirm the operation. It does not discuss auth requirements or rate limits, but with annotations present, the added refund semantics are valuable.

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 two short, front-loaded sentences with no wasted words. The key behavior, refunds as negative amounts, is stated directly after the main purpose. The endpoint reference is compact and useful.

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?

For a list tool with 7 optional parameters and full schema coverage, the description covers the essential purpose and a notable return-value behavior. Pagination and filtering details are adequately handled by the schema, so the description need not repeat them. It could be strengthened by mentioning when to use this versus bookeo_list_booking_payments.

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 description coverage is 100%, so the parameters are already well documented in the schema itself. The description only echoes the time-period and payment-method filtering semantics without adding format details, examples, or constraints beyond what the schema provides. A baseline score of 3 is appropriate when the schema does the heavy lifting.

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 a clear verb and resource: list payments received in a time period, optionally by payment method. It also notes that refunds are included with a negative amount, distinguishing the result semantics. However, it does not explicitly distinguish this tool from related siblings like bookeo_list_booking_payments or bookeo_get_payment.

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 implies usage by specifying a time period and an optional payment-method filter, which gives enough context to know when this tool is appropriate. It does not state when to use it instead of alternatives such as bookeo_get_payment or bookeo_list_booking_payments, nor does it offer exclusions.

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