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account_balance

Check your prepaid USDC balance to view remaining funds, discounted per-call price, and number of calls covered. Deposit once to pay a lower rate with no per-call gas fees.

Instructions

Check the prepaid USDC balance for an address. Free. Returns remaining balance, the discounted prepaid per-call price, and how many paid calls it covers. Deposit once with account_deposit to pay a discounted per-call rate with no 402 round-trip and no gas per call.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
addressYesThe 0x EVM address whose prepaid balance to look up (the address that funded the deposit).
Behavior4/5

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

No annotations are provided, so the description carries full burden. It discloses that the tool is free, non-destructive (checking a balance), and what it returns (balance, discounted price, number of calls). It doesn't cover edge cases like empty balance but is otherwise transparent.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is three sentences long, front-loaded with the main purpose, and each sentence adds value (purpose, cost/benefit, return details). No wasted words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple one-parameter read tool with no output schema, the description covers purpose, parameters, return values, and integration with the sibling tool. It is complete for effective selection and invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% for the single parameter 'address', with a clear description from the schema. The tool description adds no additional meaning beyond the schema, meeting the baseline of 3.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action 'Check the prepaid USDC balance for an address', specifying the resource and scope. It distinguishes itself from the sibling tool 'account_deposit' by focusing on checking balances versus depositing.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides clear context: it's free, avoids 402 errors and gas costs, and mentions depositing via 'account_deposit' first. It implies when to use (after deposit) but lacks explicit exclusions or alternative usage scenarios.

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

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