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

With no annotations, the description carries the full burden and does solid work: it declares the operation free with no quota, enumerates the source catalogues, and lists the returned fields. It does not state pagination, response size, or whether results are sorted, which keeps it out of the 5 band.

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?

Two sentences, both dense and useful, with the usage directive separated clearly at the end. The opener 'Free and without quota' is a slightly odd lead but is genuine value; overall there is very little waste.

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?

There is no output schema, so the description compensates by naming the returned fields (name, original label, use_class). Combined with the free/no-quota note and catalogue enumeration, an agent has enough to call it correctly, though return shape details like ordering or grouping are unstated.

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 coverage is 100%, so the baseline is 3; the description earns a bump by explaining that 'code' is a lookup filter and by enumerating which catalogues the 'source' parameter draws from (Spanish, foral, Austrian, Estonian, Greek), plus clarifying that 'lang' controls the returned names.

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 resource (the full crop/land-use code catalog) and what it contains (name in requested language, original label, common use_class). It also scopes the code domains covered, which lets an agent tell it apart from parcel-level siblings like get_parcel or get_agriculture.

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?

Explicitly names two use cases (translate or group crop codes) and gives an invocation hint ('pass code to look one up'). It stops short of naming an alternative sibling or stating when not to use it, so it lands just below the top band.

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