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

Adds substantial behavior beyond annotations: the two-step idempotent flow (reinforcing idempotentHint=true), the webhook side-effect ('may be notified when created'), and the crucial 'No funds are transferred' clarification despite readOnlyHint=false. No contradiction with annotations — the description is fully consistent with idempotentHint=true and destructiveHint=false.

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?

Four sentences, each earning its place: purpose, first-call behavior, second-call usage, and side effects. Purpose is front-loaded before workflow details. Zero fluff or redundancy, appropriately sized for a tool with a genuinely complex two-call approval workflow.

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 high-complexity tool (two-call flow, human approval, nested payment object, idempotency requirement), the description covers the essential workflow, idempotency rule, webhook side effects, and no-funds-transfer fact. An output schema exists to document return values (approvalUrl, publicUrl). Minor gap: doesn't detail what the approval process entails or error scenarios like rejection, but the critical calling sequence is fully specified.

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 50%, with the schema already carrying strong descriptions for key parameters: requestId ('Reuse this UUID AND identical payment details to retrieve status; never change it automatically'), network, testMode, and walletAddress. The description reinforces requestId idempotency semantics from the two-call flow but adds no new parameter-level detail for the nested payment object. With moderate schema coverage, a 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 states a specific verb and resource ('Create a shareable payment link') with a critical qualifier ('after human approval on AurasPay'). This clearly distinguishes it from siblings like auraspay_payment_get (retrieval), auraspay_payment_qr (QR generation), and auraspay_payment_invoice (invoicing). No tautology — it explains the actual function.

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 clear operational context with the two-call workflow: first call returns approvalUrl, second call with identical requestId returns publicUrl. This is explicit how-to-use guidance. However, it doesn't name alternative tools or state when NOT to use this tool in favor of a sibling like auraspay_payment_get, leaving differentiation to inference from the sibling list.

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