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

Annotations already cover the safety profile (readOnlyHint=false, destructiveHint=false, idempotentHint=true, openWorldHint=true), but the description adds two genuinely useful facts beyond them: a Solana wallet-session Bearer token is required, and no funds move during creation. That clarifies the operation is a server-side request object rather than an on-chain transfer, which the annotations alone do not convey.

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 short sentences, zero filler, with the core action front-loaded and the auth/funds caveats immediately after. Nothing could be cut without losing information.

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 4-param mutation-style tool with no output schema, the description leaves the agent guessing about amount units, the role of operation_id in relation to idempotentHint, and what the call returns (request id/handle). The auth and no-funds notes help, but the parameter-level gap keeps this at minimum-viable.

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 description coverage is 0% for 4 parameters, so the description must compensate. It hints that asset values are USDC/EURC but says nothing about whether amount_atomic is in atomic units vs decimal, what operation_id is for (idempotency key against idempotentHint), or what memo does. The coverage gap is largely unaddressed.

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?

States a specific verb and resource ('Create a Solana USDC/EURC request'), which is more precise than the generic sibling create_payment_request or the preparation-only prepare_solana_payment. It does not explicitly name which sibling to prefer in which situation, so it stops short of 5.

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 says what it creates but never states when to choose it over create_payment_request or prepare_solana_payment, nor any preconditions beyond the auth requirement. Usage must be inferred entirely from the name.

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