create_transfer

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

The description only restates the mutating nature of the operation that readOnlyHint=false already implies. It does not disclose side effects such as whether both account balances are affected, whether the transfer is reversible, or whether any additional transaction records are created.

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 a single, active-voice sentence with no filler, repeated terms, or unnecessary background. The action and resource are front-loaded and immediately clear.

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 mutating financial operation with no output schema and no usage guidance, the description is too sparse. The schema covers parameter names, but the description does not explain how this tool differs from create_transaction, what happens when the transfer is created, or what the agent should expect as a result.

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 all five parameters are already documented in the input schema. The description adds only the general 'between two accounts' framing and no extra detail about constraints or behavior beyond what the schema provides.

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 both the action ('create') and the resource ('a transfer'), and clarifies the scope as 'between two accounts.' It is not a tautology, but it does not explicitly contrast with adjacent sibling tools like create_transaction or create_split_transaction, leaving some differentiation to inference.

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 alternatives such as create_transaction or create_split_transaction. It also omits prerequisites like whether the referenced accounts must already exist.

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