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

Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered. The description adds genuinely new behavioral context that annotations cannot express: a price of $0.005 USDC per successful call, payment via x402 on Base, Solana or Arc, and that failed calls are not charged. It does not state data freshness or caching, which matters for a spot-price-bearing economics call.

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 lead sentence is well front-loaded and dense with the right facts. The middle sibling-routing sentence, however, carries low-value detail such as '64-character hex hash: timestamp' that does not help selection, and it interrupts the definition before the pricing note.

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 an output schema present, return values need not be spelled out, yet the description lists them anyway and pairs that with cost and payment details, covering what an agent needs to decide and call. Only freshness and whether the numbers are current-snapshot versus historical are unaddressed.

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, which is the baseline-4 case; there is nothing an agent must supply or misconfigure. The description instead spends its words on guaranteed output fields, which is useful but does not add parameter meaning.

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 the resource and enumerates the exact outputs (block reward in KAS, nominal 864,000 blocks/day, daily emission, revenue per TH/s in KAS and USD, spot price), so an agent knows precisely what it gets back. It does not differentiate itself from the closest confusion points on the server, notably crypto_btc_mining_economics or crypto_kaspa_hashrate, which also report mining-related figures.

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?

The description explicitly routes to alternatives with conditions: 'crypto_kaspa_block when you need Detailed Kaspa block by 64-character hex hash' and 'crypto_kaspa_chain_color when you need blue vs red block counts'. That is clear when-to-use guidance, but it picks only two siblings and offers no exclusion against the most similar tool, the Bitcoin equivalent crypto_btc_mining_economics.

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