get_credits_and_payment_info

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

With no annotations, the description carries the full behavioral burden. 'Returns' implies a read-only lookup and the description lists its key outputs, but it omits authentication requirements, rate limits, side effects, and whether the optional txHash changes the response scope.

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 front-loaded sentence that lists the three returned items with no filler. Every phrase contributes directly to understanding the tool's output.

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 simple one-parameter lookup with no output schema, the description identifies the important return components clearly. Minor gaps remain around auth/prerequisites and what happens when txHash is omitted, but the schema covers the parameter semantics.

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 100%, so the parameter is already fully documented as an optional Base USDC transaction hash. The description only repeats 'for a txHash' and adds no extra meaning about format, optionality, or behavior when omitted.

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 uses a specific verb and names three concrete outputs: remaining prepaid USDC balance, free daily trial status, and deposit instructions. It is clearly a billing/credits lookup tool, immediately distinguishable from the analytics-focused sibling tools.

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?

Usage is implied by the purpose: check balance, trial status, or deposit instructions. However, the description does not explicitly state when to use this tool versus alternatives, nor whether txHash is required or optional.

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