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

With no annotations, the description carries the full burden and does disclose the key operational trait: the call costs $0.003 USDC on Solana via x402, which an agent must know before invoking. It stops short of explaining the x402 handshake, rate limits beyond the schema's free-tier field, or failure modes, so it is not a 5.

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?

A single dense line that front-loads the capability and return fields before the input and cost. No sentence is wasted, though punctuation and the terse 'Input: {mint}' phrasing slightly reduce readability.

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 tool with no annotations and no output schema, the description does well to enumerate returned fields and payment cost. However, it doesn't explain the x402 payment flow, how free_trial relates to x402_payment, or how the rug-risk flags are derived/thresholded, leaving agents to infer key behavior.

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%, so the schema already defines mint, free_trial, and x402_payment. The description's 'Input: {mint}' adds no format or syntax detail beyond what the schema says, matching the baseline for full coverage.

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+resource ('Solana SPL token snapshot + rug-risk flags') and enumerates returned fields (name/symbol, supply, decimals, price, authority status, holder concentration, token program), so an agent knows exactly what data it yields. It does not differentiate from the sibling token_verdict, which likely overlaps, so it stops short of a 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?

Usage is only implied by the snapshot purpose; there is no explicit when-to-use, when-not-to-use, or routing to token_verdict. The payment note hints at a precondition but doesn't frame it as guidance.

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