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

With no annotations, the description carries the behavioral burden; it does convey that this is a read-only retrieval of monthly official data, which is useful. It does not disclose response shape, units, or whether `months` controls the number of historical months returned, so transparency is partial.

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?

One compact sentence front-loads the verb and object and enumerates all commodities without redundancy. No filler or repeated schema information.

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 one-parameter getter, the description covers the data scope but omits the meaning of `months` and any return-format cues. Since there is no output schema or annotations, these omissions leave the tool minimally viable rather than 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?

The `months` integer is the sole parameter, with default/min/max in the schema but no schema description, and the tool description never mentions it. The name and bounds provide a weak inference, but the description adds no meaning at 0% schema coverage.

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 retrieval verb ('Get') and a clearly bounded resource: official monthly Luxembourg prices for six named commodities. It distinguishes the tool's fuel-price scope from most siblings, though it does not explicitly differentiate from overlapping siblings like get_electricity_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 scope implies 'use for official monthly fuel/energy prices in Luxembourg,' but there is no explicit when/when-not guidance or mention of alternative tools. Given sibling overlaps (get_electricity_prices, get_ev_charging), this is a notable gap.

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