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

The description discloses that this is a financial withdrawal ('Performs a FIAT withdraw') and adds a balance-type constraint, which is useful behavioral context. However, with empty annotations, it does not describe side effects (e.g., balance deduction), reversibility, permission requirements, or failure behavior, leaving significant gaps for a money-moving 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 compact and front-loaded with purpose. The @param sections are structured and each line adds value, such as clarifying the account_fk type. Minor verbosity exists in the parenthetical account_fk explanation, but it is necessary for correctness. No fluff or redundancy.

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 4-parameter financial tool with empty annotations, the description covers the basics: purpose, key parameter semantics, and a scope constraint. However, it lacks usage guidance, amount units, and any mention of error conditions or postconditions. An output schema exists, so return value details are not required, but the missing usage context and ambiguous amount keep it from being fully complete.

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. The @param blocks provide valuable meaning: api_key is 'allocated to your application', token comes from '/access/login', and account_fk is clarified as a database ID (int) not an address and non-zero. The amount parameter is only described as 'amount to issue for', lacking units or currency context, but overall the parameter guidance is strong.

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 clearly states the tool's function: 'Issues a Netfluid voucher' and 'Performs a FIAT withdraw'. It also specifies scope ('Only applicable on FIAT balances'), which distinguishes it from sibling tools like netfluid__account_merchant_voucher_quote and netfluid__account_merchant_voucher_redeem.

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 alternatives. The constraint 'Only applicable on FIAT balances' provides a condition but does not compare this tool to other financial actions like account_charge, account_send, or withdraw_to_bank, nor does it mention exclusions or prerequisites beyond FIAT balance.

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