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

No annotations provided. Description discloses data freshness, fusion sources, and cost ($0.02/call with x402 payment). However, it lacks details on failure modes, latency, or required permissions. Some behavioral context is present.

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 description is two sentences plus a competitor note and pricing. It is relatively concise but could be more structured. No wasted words, but the information is dense.

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 tool with 2 params and no output schema, the description covers purpose, data sources, freshness, availability, and pricing. It lacks return structure (e.g., confidence score format) but is largely complete.

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 coverage is 100%, but description adds value by explaining timeframe options (5m,15m,1h,4h) with default 1h, and symbol as coin ticker. This goes beyond the schema's minimal descriptions.

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 clearly states it provides a fused trading signal (long/short/neutral) with confidence, combining multiple data sources. It uses specific verbs 'fusion' and 'signal' and distinguishes itself from competitors selling separate components.

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 context for usage ('Should I go long or short?', 'Derivatives trading signal for any altcoin') but does not explicitly mention when not to use or contrast with sibling tools like crypto_derivatives_radar or crypto_pre_trade_verdict.

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