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

With no annotations, the description carries the full burden and does reasonably well: it discloses the payload shape (latest monthly average, year-over-year change, unit, provenance), the currency basis (nominal USD), the index base (2010 = 100), and the licensing (CC BY 4.0). It omits any note on rate limits, auth, or whether a call with no group returns all 44 commodities plus indices.

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 dense sentence front-loads the source and scope, then the payload contents, then the history alternative. The parenthetical commodity list is long but functions as category coverage; it could be trimmed without much loss.

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 single-optional-enum, read-only data lookup with no output schema, the description supplies enough: what data, what source, what fields come back, what the units are, and where to go for history. Nothing essential to calling it correctly 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% and the single enum parameter is already fully documented, including the meaning of 'index'. The description's mention of '44 commodities' and '9 World Bank price indices' loosely maps to the enum categories but adds no new semantics about filtering behavior — baseline 3 applies.

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 names the exact resource and source: 'World Bank monthly commodity prices (the Pink Sheet)' covering 44 commodities and 9 indices. It is far more specific than the name alone, but it never distinguishes itself from plausible siblings such as palanor_get_index or palanor_get_global_yields, which an agent could easily confuse for price data.

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?

It gives one explicit routing rule: 'Full history via palanor_get_signal', which tells the agent when to go elsewhere. The 'latest monthly average' framing also implies the tool is for current snapshots rather than time series, but there are no explicit exclusions or prerequisites.

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