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

No annotations provided. Description discloses it is a paid tool ($0.005) and uses POST method, but does not discuss rate limits, authorization needs, failure modes, or any other behavioral traits.

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?

Three concise sentences with no wasted words. Front-loaded with core purpose and data returned. Additional details (payment, endpoint) are in brackets, keeping the main description clean.

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 simple data retrieval tool with 3 params and no output schema, the description covers the returned data fields, pricing, and supported currencies. Missing response format details (e.g., JSON array) but acceptable for this complexity.

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% (all three parameters have descriptions). Description adds minimal value by summarizing 'Send { currency, expiry? }' and noting expiry defaults to nearest. This is adequate but does not provide additional meaning beyond the schema.

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?

Clearly states tool returns full options chain for a currency and optional expiry, listing specific data fields (mark price, IV, open interest). Distinguishes from siblings like options_greeks or options_price by specifying 'per-strike calls & puts' and 'complete options board'.

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?

No explicit when-to-use or alternatives are given. The description implies use when needing full options chain data, but does not compare with other options tools or provide guidance on tool selection.

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