get_payment_info

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

With no annotations provided, the description carries the burden of behavioral disclosure. 'Returns' implies a read operation, and the listed content categories give basic insight, but there is no explicit statement about side effects, permissions, or whether this is purely non-mutating. This is adequate but not deeply transparent.

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 sentence that front-loads the operation ('Returns') and then lists the specific returned data categories. Every word contributes information, with no filler or redundant phrasing.

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 zero-parameter, read-only information tool with an output schema present, the description is largely complete: it names the three key output categories. The only gap is the potential ambiguity between 'vault endpoints' and the sibling get_vault_balance, which could have been clarified.

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?

The tool has zero parameters and the input schema confirms an empty properties object with 100% schema description coverage. With no parameters to document, the baseline of 4 applies and the description need not add parameter detail.

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 ('Returns') and names the resource categories: Web3 x402 micropayment pricing, multi-chain USDC details, and vault endpoints. It is clearly distinguishable from the clean_* siblings, though the mention of 'vault endpoints' creates some overlap with get_vault_balance.

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 gives no explicit guidance on when to use this tool versus alternatives. It does not mention get_vault_balance or other siblings, so an agent must infer selection entirely from the listed content categories.

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