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

Annotations already declare a non-read-only, open-world, idempotent, non-destructive mutation. The description adds substantial context beyond that: x402 API pricing, shared free-call quota, wallet-proof binding, consent process, betting close rules, missing-report stake return, and retry behavior.

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?

The purpose is front-loaded and most sentences carry operational value for a paid, consent-gated market-opening call. It is still a dense single paragraph and could be better structured, but it avoids significant repetition.

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 complex paid mutation with no output schema, the description covers cost, consent, closure, refunds, retry semantics, and points to the contract endpoint for schemas and receipt verification. It still leaves parameter-level and response-level details thin.

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%, so the description must compensate, but it only partially does. It implies date_id links to the completed first date and explains request_id reuse for retries, but it never explains closes_at or the parameter patterns and constraints.

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 specific verb and resource: creating a market linked to a completed staked first date. It distinguishes this from betting/resolution siblings by centering on the consent-gated opening of the market before betting begins.

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 gives clear prerequisites: a completed staked first date and both daters signing in to approve exact terms before betting opens. It also explains retry/status request_id handling, though it does not name explicit alternatives or when-not-to-use conditions.

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