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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only states 'Free' and the creation action, but does not disclose side effects, permission requirements, reversibility, or what happens on duplicate creation. The mention of 'Free' is a minor behavioral note but insufficient for a mutation tool with no annotation safety coverage.

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 very short, with the core purpose front-loaded. However, the first two sentences ('Create a payout recipient' and 'Creates a person or company money can be sent to') are somewhat redundant and could be condensed. Still, it is efficient and avoids unnecessary detail, so it earns a 4.

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 simple nature of the tool, the description provides enough context for an agent to call it correctly: it states what it creates and flags the need to use addBankingDestination for bank details. The schema covers all parameters, and the lack of an output schema is not a major gap because the creation outcome is straightforward. It is adequate but could benefit from a note about expected response or error cases.

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 schema already documents all three parameters fully. The description adds no additional parameter-level meaning beyond pointing out that bank details are attached separately, which is already implicitly covered by the address parameter description. Baseline of 3 is appropriate because the schema carries the parameter documentation burden.

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 opens with 'Create a payout recipient' and clarifies that it creates 'a person or company money can be sent to.' It also distinguishes itself from add_banking_destination by noting bank details are attached separately, which is a clear example of sibling differentiation. The purpose is specific and unambiguous.

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 the workflow: create the recipient first, then attach bank details with addBankingDestination. This gives clear contextual guidance on when to use this tool in relation to its sibling. However, it does not explicitly mention alternatives like create_banking_account or create_banking_profile, nor does it state when not to use the tool, so it lacks full exclusionary guidance.

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