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

With no annotations, the description carries the behavioral disclosure burden. It does add value by naming the three output regime buckets and the HAR-lite model, but it does not disclose staleness, lookback window, limitations, or any other behavioral detail.

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 short and front-loaded with the model and output categories. The 'not Trapdoor wall trust' phrase is cryptic and may not earn its place, but the overall length and ordering are appropriate.

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?

Given zero annotations and a cryptic one-line description, an agent cannot confidently determine when to invoke this tool or how to interpret the result semantically. The output schema helps with return shape, but not with the meaning of the regime buckets, data scope, or invocation context.

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 0%, and the description says nothing about the 'symbol' parameter. The parameter is self-evident from its name and default value, but the description still fails to add any guidance on accepted symbols or behavior when omitted.

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 identifies the resource (realized volatility) and the output classification (Calm / Elevated / Explosive), which is more specific than the name alone. However, it relies on unexplained jargon such as 'HAR-lite' and 'Trapdoor wall trust' and does not explicitly say it returns a regime classification.

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?

There is no guidance on when to use this tool versus its many get_* siblings. The parenthetical 'not Trapdoor wall trust' hints at a distinction but provides no actionable context for an agent deciding between tools.

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