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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered. The description adds a genuinely non-obvious behavioral fact beyond the annotations: the call is free and does not count toward the daily limit, which matters for agents budgeting tool calls. It stops short of describing the exact response shape or freshness of the data.

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 tight sentences, front-loaded with the identity statement before the anti-copycat caveat and the cost note. Every clause carries information an agent would otherwise have to guess.

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 does the work of naming what comes back (mint address, launch wallet, links), which is sufficient for a static zero-argument lookup. It could be slightly stronger by stating whether the returned data is static/curated versus fetched live, but nothing needed for correct invocation is absent.

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 takes zero parameters, so the baseline is 4 and there is nothing for the description to disambiguate. No parameter text is needed and none is missing.

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 resource (the official $AFUEL mint address on Solana) and its accompanying payload (launch wallet and links), so an agent knows exactly what it returns. It does not explicitly contrast itself with siblings like rugcheck or safe_buy, but no sibling overlaps this lookup, so the gap is minor.

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 implied rather than stated: the anti-impersonation warning ('Other tokens can copy the name or ticker; only this mint is AFUEL') tells the agent this is the authoritative source when verifying the token. There is no explicit 'use this when...' framing or mention of when another sibling (e.g. rugcheck) is the better call.

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