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

Annotations already declare readOnlyHint=true, openWorldHint=true and destructiveHint=false, so the safety profile is covered. The description adds genuinely useful behavioral context by disclosing the returned field set and the underlying REST call (GET /elastic-ip), which helps an agent understand what a call yields even absent an output schema.

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 compact sentences, front-loaded with the action and scope, with no filler. The trailing 'GET /elastic-ip' is mildly redundant for a listing tool but serves as a useful API mapping, so waste is minimal.

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 enumeration of returned fields is the most valuable thing this description could supply and it does so. It omits any mention of pagination or response ordering, which the schema partially covers via limit/offset, so it is nearly complete rather than fully 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?

Schema description coverage is 100%, so zone, limit and offset are already fully documented in the schema; the 3 baseline applies. The phrase 'of a zone' reinforces the scoping role of the zone parameter but adds no syntax, defaults or format detail beyond the schema.

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 states a specific verb (list) and resource (elastic IP addresses) scoped to a zone, and enumerates the fields returned (description, address family, health-check settings, labels). It is clearly distinct from exoscale_get_elastic_ip by virtue of listing versus fetching a single resource, though it never names that sibling explicitly.

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?

Usage is implied by 'list... of a zone' — an agent can infer this is the enumeration counterpart to exoscale_get_elastic_ip. However, there is no explicit statement of when to prefer this over the get variant, nor any prerequisite or exclusion guidance.

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