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

Annotations already indicate destructiveHint=true, so the agent knows it's a mutating operation. However, the description adds no further behavioral context about what changes occur (e.g., whether existing VIPs are replaced, if downtime is expected, or if the resource must be stopped).

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 very short, but the second sentence redundantly restates the first with only 'using the machine id' added. It could be more concise by merging into one sentence without loss of 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?

As a destructive mutation with no output schema, no parameter details, and no usage guidance, the description is insufficient for an agent to understand the full scope of the operation. It lacks information about preconditions, side effects, and postconditions.

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 0%, so the description must compensate. It clarifies that 'resourceId' is the 'machine id' and hints at the resourceType enum (VPS/VDS/Bare Metal), but leaves ip format, header requirements, and other parameters unexplained.

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 clearly states the action ('Assign a VIP') and the target resource type ('VPS/VDS/Bare Metal'), which distinguishes it from read-only tools. However, it doesn't differentiate from sibling tools like createAssignment or unassignIp, which could also involve assignments.

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 guidance is provided on when to use this tool versus alternatives, nor any prerequisites or conditions (e.g., IP availability, resource state). The description simply restates the action without context.

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