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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false and destructiveHint=false, so the safety profile is covered. The description usefully adds that the result set is exhaustive ("Every destination sold") and bilingual in FR/EN, but says nothing about ordering, size, or whether names are a structured pair or flat strings.

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 short sentence with no waste, and the scope qualifier is front-loaded. It is arguably too terse rather than padded, but nothing is redundant.

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?

With no output schema, the description would ideally state the shape of a returned destination (identifier, FR name, EN name, grouping) so an agent knows what it can bind to. As a simple read-only list tool the gap is modest, but it is still a gap.

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 parameter is a self-documenting optional telemetry field unrelated to the query semantics, so the schema carries the load. The description adds no parameter meaning beyond it, which matches the baseline 3.

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?

"Every destination sold, with its name in French and English" identifies the resource and its scope (a complete catalog of sellable destinations with bilingual names), but there is no verb and no signal distinguishing it from siblings like coverage_check or plans_list, which plausibly touch the same domain.

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 when-to-use guidance: nothing says whether this is for populating a picker, validating coverage, or pre-checkout display, and no alternative (e.g. coverage_check) is named or excluded.

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