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

With no annotations, the description carries the full behavioral burden. It discloses that prices are 'current' and 'live' and includes units, but it does not mention update frequency, potential delays, data source, response shape, or whether both commodities are always returned in a single call.

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?

A single sentence delivers the essential information: action, resource, specific commodities, and units. There is no filler, and the key scoping details are front-loaded.

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 parameterless price lookup, the description is nearly complete: it names both return commodities and their units. It does not explain the response envelope or any data-source caveats, but the absence of parameters and siblings covering the same domain keeps the remaining gap small.

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?

The tool has zero parameters, so there is no parameter semantics to document. The description correctly focuses on the fixed output commodities and units instead, making invocation unambiguous.

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 specific verb ('Get'), resource ('current live spot prices'), and exact commodities with units (WTI Crude Oil in USD/barrel, Henry Hub Natural Gas in USD/MMBtu). It clearly distinguishes itself from sibling tools, which are about drilling activity, production, permits, and wells rather than prices.

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 context is clear: use this tool when you need current WTI and Henry Hub spot prices. While it does not explicitly name alternatives or exclusions, no sibling tool overlaps with price data, so the guidance is sufficient without being redundant.

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