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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds useful behavioral detail by listing exactly what the call returns and constraining it to one expiration, going beyond the annotations without contradicting them.

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 with no filler, front-loading the core purpose before the example. The inline example is compact and useful for constructing a valid invocation.

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 read-only, idempotent tool with a 100%-covered schema and no output schema, the description covers the main gaps: what the tool returns and how to call it with required parameters. It does not discuss pagination or optional filters in prose, but the schema already handles those details, so nothing critical 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?

Schema description coverage is 100%, so the baseline is 3 even though the description adds little parameter-level meaning. The example reinforces the three required parameters (symbol, expiration, _apiKey), but it does not clarify optional filters like type or moneyness beyond what the schema already states.

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 specifies a clear verb and resource: it returns an options chain with greeks and implied volatility for a symbol at a given expiration. It also enumerates the returned fields (strike, type, bid/ask/last, volume, open interest, delta, IV), which distinguishes it from sibling tools like intrinio_analyst_estimates or intrinio_unusual_options.

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 makes the intended use obvious: call this when an agent needs per-contract options data with greeks and IV for a specific symbol and expiration. It does not explicitly state when not to use it or name alternatives, but the example and scoping language provide sufficient context for selecting this tool.

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