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

With no annotations, the description carries the full burden and does substantial work: it discloses the signing format (signMessage, UTF-8, base58 signature), per-action expiry windows, and the requirement to pass back the returned issued_at unchanged. It omits auth/permission requirements and error behavior, keeping it below 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?

Front-loaded with the core purpose, then a tight per-action list where each line adds a distinct requirement. No filler sentences; every clause carries information an agent needs.

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 5-parameter, 0%-schema-coverage tool with no annotations and no output schema, the description covers the action semantics, required companion parameters, and validity windows, and it hints at the return value (the text plus issued_at). The missing pieces are the wallet parameter's contract and how issued_at is actually supplied, which are non-trivial gaps.

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% across 5 parameters, so the description must compensate, and it does: it maps action, mint, callout_id, and event_id to concrete per-action requirements. wallet's expected meaning (creator wallet holder for launch) is only implied, and issued_at is referenced as a value to pass even though no such input parameter exists in the schema, which introduces a small ambiguity.

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 precise verb+resource: it returns the exact UTF-8 text a wallet must sign before an action, and enumerates the three action values with their individual requirements. It is easy to distinguish from the transaction-preparation siblings, though it never names an alternative tool explicitly.

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 clearly broken out per action: what each action proves or registers, which parameters it needs (mint/callout_id for queue, mint/event_id for fomo_bonus), and the 10- vs 15-minute validity windows. No explicit when-not-to-use or named alternative is given, so it falls short of a 5.

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