Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Goes well beyond the readOnly/openWorld annotations: discloses that salary is not returned, that only one company's board is queried per call, and specifies the payment model ($0.002 USDC per successful call via x402 on Base/Solana/Arc, failures not charged), which is real auth/billing behavior an agent must know before calling.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.