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hcloud_server_poweron_action

Start a Hetzner Cloud server by turning its power on using its ID, with optional polling until the action succeeds or times out.

Instructions

Power on a Server

Starts a Server by turning its power on.

Input Schema

NameRequiredDescriptionDefault
idYesID of the Server.
waitNoPoll the resulting action until success/error or timeout.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.2.0

TDQS

C2.4/5.0
Behavior2/5

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

Annotations already declare readOnlyHint=false, destructiveHint=false and openWorldHint=true, so the safety profile is covered elsewhere. The description adds no behavioral context of its own: it does not say the call is asynchronous, that it returns an Action object, that 'wait' polls it, or what happens when the server is already running.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness2/5

Is the description appropriately sized, front-loaded, and free of redundancy?

It is short, but the second sentence is pure redundancy of the heading, so half the content does no work. No front-loaded detail beyond the name.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a mutating, open-world action tool with no output schema, the description omits essentials: that it triggers an async action whose progress is polled by 'wait', and that the server must be powered off. An agent can guess from the name but is not informed.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and both parameters (id and wait) are fully documented in the schema, so the description does not need to explain them. It adds nothing beyond the schema, which is the baseline case.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose3/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description names a specific verb and resource ('Power on a Server', 'turning its power on'), so the intent is understandable. But the second sentence only restates the first, and nothing distinguishes it from close siblings such as hcloud_server_power, hcloud_server_reset_action, or hcloud_server_reboot_action, so an agent gains no discriminating information.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

There is no guidance on when to use this versus hcloud_server_power or hcloud_server_reboot_action, and no stated preconditions (e.g. the server should currently be off). Usage is only implied by the tool name.

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

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