hcloud_list_dcs_available_zones

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and openWorldHint=true, so the safety profile is covered structurally. The description adds only the service scoping ('DCS (Redis)') and says nothing about whether results vary by region, caching, or failure behavior for an invalid region.

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, front-loaded with the verb and resource, with no redundant wording. It is efficient, though its brevity is partly under-specification rather than deliberate tightness.

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-parameter read-only list tool with no output schema, the description is minimally adequate. An agent still cannot tell what fields each zone entry contains or how this differs from the generic availability-zones tool, but nothing about invocation is actively wrong.

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%, but the sole parameter is documented only as 'Region', which conveys no format, enumeration, or example. The description mentions no parameter at all, so it fails to compensate for a schema that is technically complete but semantically thin. Baseline 3 applies given full 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?

The description gives a specific verb and resource ('List available availability zones') scoped to the DCS/Redis service, which separates it from most siblings such as hcloud_list_dcs_flavors. It does not, however, distinguish itself from hcloud_list_availability_zones, the compute-level counterpart, leaving the agent to guess which AZ list applies.

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 explicit when-to-use guidance, no statement of prerequisites (a valid region must be chosen first), and no mention of the alternative hcloud_list_availability_zones. The agent must infer the usage scenario entirely from the tool name and the DCS parenthetical.

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