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

No annotations exist, so the description carries the full burden, and it does disclose the output categories and the payment model ($0.30 per call, USDC on Base via x402) — genuinely useful behavioral context. However it omits return shape detail, data freshness/latency, and failure behavior when a ticker is absent from some exchanges, which matters for a multi-source comparison tool.

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 fits in one sentence with no filler, but the structure is a run-on of arrows and commas rather than front-loaded prose, which hurts scannability. Compact, yet the compression trades clarity for brevity.

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 one parameter, no output schema, and no annotations, the description supplies the essentials: what is compared, which venues, the possible verdicts, the payment terms, and the intended use case. It is close to sufficient for an agent to call it correctly; only error/edge-case behavior is missing.

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?

There is a single 'coin' parameter with 100% schema description coverage including an example ('TRUMP'), so the schema already does the work. The description adds no semantics beyond that (e.g. case sensitivity, symbol vs contract address accepted), which is fine at baseline.

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?

States a concrete check: whether the same ticker maps to the same token across bitget/gate/htx/kucoin, plus price vs median across five exchanges, returning CONSISTENT/DIVERGENT/COLLISION. The verb+resource is specific and no sibling tool overlaps, though the arrow-shorthand delivery makes it slower to parse than a plain sentence.

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 parenthetical '(anti-scam before deposit/arbitrage)' gives two concrete situations for calling it, which is real usage context. It does not say when not to use it, nor name any alternative among the 15 sibling tools, so guidance is implied rather than explicit.

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