Set root password

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

Annotations already declare readOnlyHint=false, destructiveHint=true, and idempotentHint=true, covering the safety profile. The description adds a link to password requirements on the recreate endpoint, but it does not disclose additional behavioral consequences such as sessions being invalidated or services being restarted. This is adequate but not rich.

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?

The description is compact and front-loaded: the first sentence states the core action, the second provides the password requirement reference, and the third gives usage context. No redundant or filler content.

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 two-parameter mutation with annotations covering its destructive and idempotent nature, the description is mostly complete. It provides purpose, usage context, and password constraints. Minor gaps include no explicit contrast with VPS_setPanelPasswordV1 and no indication of what response the caller should expect, but these are not critical for selecting and invoking the tool.

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%, so the baseline is 3. The description adds value by linking to the recreate endpoint for password requirements, giving the agent a concrete reference for password validation rules beyond the simple schema description 'Root password for the virtual machine'.

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 action ('Set root password') on a specific resource ('a specified virtual machine'), and further clarifies the purpose as updating administrator credentials. It distinguishes itself naturally from the sibling VPS_setPanelPasswordV1 by specifying root password rather than panel password.

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?

The description clearly states when to use the endpoint ('Use this endpoint to update administrator credentials for VPS instances'). It does not explicitly mention alternatives or exclusion conditions, but the context is clear enough for an agent to select it over unrelated tools.

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