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

With no annotations at all, the description carries the full burden and does well: it discloses that the call is paid, the exact price ($0.05 USDC on Base or Solana), that no account or API key is needed, and that failed calls are not charged. It omits response format, latency, and rate limits, which is the remaining gap.

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?

It is compact and front-loaded, leading with 'Paid' and then the data delivered, followed by cost and access terms. Every clause carries decision-relevant information, though the bare URL tacked on at the end is the least useful element.

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?

There is no output schema, so the description must convey what comes back — it names price, 24h change, and market-cap rank. Combined with payment method, chains, and no-auth/failure-charge terms, an agent has everything needed to decide and invoke this zero-parameter call.

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 there is nothing to disambiguate and the baseline applies. The description correctly signals a parameterless call, and the embedded URL confirms the resource is fixed.

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 ('SoSoValue (SOSO) price: live USD price, 24h change and market-cap rank'), so the agent knows exactly what data comes back. It does not distinguish itself from the many sibling price tools (buy_coin_*, buy_crypto_price), which is the only clarity gap.

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 only implied by the subject matter — an agent can infer it should call this to get SOSO pricing. It gives no explicit when-to-use guidance and never names an alternative such as buy_crypto_price or a buy_coin_SOSO equivalent, leaving routing between ~700 sibling price tools to inference.

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