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

Annotations already declare readOnlyHint=false, destructiveHint=true, and openWorldHint=true, so the agent knows this is an irreversible external write. The description adds real value with the destination lock to the verified EVM-bound address and the 'available' balance restriction. It says nothing about irreversibility specifics, authorization requirements, or what happens on a duplicate submission.

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?

A single front-loaded sentence with no filler; the scope, asset, and destination constraint come first. It is efficient, though its density leaves key operational details unstated rather than unpacked.

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 destructive, open-world mutation with zero parameter documentation and no output schema, the description is too thin. It omits idempotency behavior, amount units, and how to confirm the withdrawal afterward, all of which an agent needs before invoking it.

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 0%, so all three parameters are undocumented in the schema and the description does not compensate. The meaning of amountMinor, the units convention of 'minor', and the role of idempotencyKey are never explained. Only walletId is indirectly implied by 'owned wallet'.

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 specific verb and resource: transfer USDC out of an owned wallet. It also narrows the destination to the wallet's verified EVM-bound address, which separates it from payment-style siblings like send_payment or request_payment. It does not explicitly name a sibling, so it stops short of a 5.

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 an implicit usage constraint: the transfer is limited to 'available' funds and to the pre-verified EVM-bound address, so no arbitrary destination can be chosen. However, it never says when to use this versus send_payment, and it does not mention get_withdrawal_status for tracking the result. The context is inferable rather than stated.

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