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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description adds meaningful non-annotation context: the 0.01 USDC cost, the settlement endpoint, the payTo address, and the retry/payment-header mechanics, which an agent must know to invoke it successfully.

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, front-loaded with the resource description followed by the payment mechanics. The dense payment details (URLs, addresses, header names) all earn their place for correct invocation, with little filler.

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?

With no output schema, the description compensates by enumerating the returned fields (price, market cap, liquidity, 24h volume, brief) and fully documents the payment/retry flow. Nothing essential for a paid single-param read tool appears missing.

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 100% for the single `mint` parameter, and the schema itself documents the Base58 SPL mint address and its pattern/length. The description adds no meaning beyond that, so the baseline 3 applies.

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 names a specific verb+resource: a 'Solana SPL token market snapshot' enumerating the exact fields returned (price, market cap, liquidity, 24h volume) plus a brief. This is clear and concrete, though it does not explicitly differentiate itself from the similarly-named sibling sol_mint_info.

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?

It provides strong operational guidance on the payment flow (cost 0.01 USDC, pay the resource URL in the 402 challenge, retry with PAYMENT-SIGNATURE or X-PAYMENT), but gives no guidance on when to choose this tool over sol_mint_info or the other siblings. Usage is implied rather than scoped.

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