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

The description states that the wallet is credited automatically on successful payment and returns a client_secret. Annotations indicate mutation (readOnlyHint=false) and side effects (openWorldHint=true). No mention of failure cases or authorization, but the core behavior is disclosed.

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?

Two sentences: first states the purpose and key output, second adds constraints and success behavior. No unnecessary words; each sentence adds value.

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 low complexity, high schema coverage, and presence of output schema, the description covers the essential aspects: purpose, constraints, return value, and automatic crediting. No gaps.

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% with detailed descriptions for both parameters. The description repeats the min amount and confirms the default currency, but adds little beyond the schema. Baseline 3 is appropriate.

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 clearly states the tool creates a Stripe PaymentIntent to top up the wallet with credits, which is a specific verb+resource. It differentiates from sibling wallet tools like wallet.balance, wallet.history, wallet.transfer, and wallet.crypto_deposit.

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 mentions minimum and maximum amounts ($5 to $10,000) but does not explicitly compare to alternatives like wallet.crypto_deposit or wallet.transfer. The context implies it is for fiat credit top-up, but when-to-use guidance could be clearer.

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