hcloud_create_zone

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

Annotations cover the safety profile (readOnlyHint=false, destructiveHint=false, openWorldHint=true), and the description adds genuinely useful behavior beyond them: the automatic creation of an SOA record and three NS records with Hetzner nameservers. It does not mention whether the call is idempotent, what happens on name collisions, or what the wait parameter's polling does, but the auto-provisioning disclosure is real added value.

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?

Three short lines, front-loaded with the operation and followed by the most important side effect. The one inefficiency is the duplicated opening ("Create a Zone" then "Creates a [Zone]"), which wastes a line without adding information.

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 creation tool with no output schema and rich nested input, the description covers what is created but not what is returned, nor the primary/secondary mode split that governs most optional parameters. Adequate to call the tool, but incomplete on the behavior an agent would want to confirm success.

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?

With schema description coverage at 50%, the nested schema still documents body fields (ttl, mode, name, labels, rrsets, zonefile, primary_nameservers) and wait thoroughly, so the baseline of 3 applies. The description adds nothing about the mode-dependent mutual exclusivity of rrsets/zonefile versus primary_nameservers, nor about wait, so it does not compensate for the coverage gap.

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 verb and resource ("Create a Zone") plus a concrete side effect (default SOA and three NS records created automatically), so an agent knows exactly what the call produces. However, the first two lines are near-tautological ("Create a Zone" / "Creates a Zone") and it never differentiates itself from siblings such as hcloud_import_zonefile_action or hcloud_update_zone.

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?

No statement of when to use this versus alternatives, no prerequisites (e.g., that mode must be chosen and that rrsets/zonefile only apply to primary zones), and no mention of when not to use it. The agent must infer all routing decisions from the name and schema.

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