List SSH keys in your Hetzner Cloud account to review, filter by name or label, or fetch one by ID. Read-only access for key inventory and audit.
List SSH keys. Read only.
| Name | Required | Description | Default |
|---|---|---|---|
| id | No | Fetch one by id. | |
| query | No | Filters, e.g. name, label_selector. | |
| verbose | No | Full payload. |
Changes observed during successful MCP inspections.
v0.7.0Input schema / properties / id / descriptionPrevious value: -"Optional resource id to fetch a single item."New value: +"Fetch one by id."Input schema / properties / query / additionalProperties / anyOfRemoved value: -[
- {
- "type": "string"
- },
- {
- "type": "number"
- },
- {
- "type": "boolean"
- }
-]Input schema / properties / query / additionalProperties / typeAdded value: +[
+ "string",
+ "number",
+ "boolean"
+]Input schema / properties / query / descriptionPrevious value: -"Optional query parameters such as name or label_selector."New value: +"Filters, e.g. name, label_selector."Input schema / properties / verbose / descriptionPrevious value: -"Return full payload instead of the compact view."New value: +"Full payload."v0.3.0Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. It does disclose the key behavioral trait 'Read only,' which is genuinely useful safety context, but it says nothing about pagination, permissions, or result shape.
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 short, front-loaded sentences with zero filler; the verb+resource and the safety hint come first. It is efficient, though arguably terse given the absence of annotations.
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 simple optional-param list tool with a fully documented schema and no output schema, the description is minimally adequate. It omits pagination behavior and any routing versus robot_list_ssh_keys, which a mutation-free listing tool of this kind would benefit from.
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 the schema already documents id, query filters, and verbose. The description adds no meaning beyond that, which is the baseline 3 when the schema does the work.
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+resource ('List SSH keys'), which distinguishes it from the many other list siblings by resource type. However, it does not differentiate itself from the closely-named sibling robot_list_ssh_keys, leaving the agent to guess which listing tool 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?
No when-to-use guidance, no prerequisites, and no mention of the robot_list_ssh_keys alternative that appears in the sibling list. The agent gets no help deciding between the cloud and robot SSH key listings.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.