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

Annotations already declare destructiveHint=true, readOnlyHint=false, and idempotentHint=false, so the safety profile is known. The description adds nothing beyond them: it does not say whether the subdomain stops resolving immediately, whether the alias can be recreated, or whether removal affects the underlying deployment — context that matters specifically for a destructive mutation with no output schema.

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 sentence is front-loaded and free of filler, so nothing needs cutting. But at six words it is under-specified rather than truly concise — brevity here is achieved by omission, not by tight writing.

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?

This is a destructive, non-idempotent mutation with an undocumented parameter and no output schema, so the description carries most of the explanatory burden and does not meet it. An agent can guess the intent but has no information on the target identifier's meaning or the effect of the call.

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% for the single required `id` parameter, so the schema only says it is a non-empty string. The description does not clarify whether `id` is a deployment identifier, a project identifier, or the subdomain string itself, which is exactly the ambiguity that matters before a destructive call.

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 gives a specific verb and resource ("Remove the subdomain alias"), which pairs cleanly with the sibling setSlug and contrasts with remove operations on custom domains. It does not, however, explicitly disentangle itself from deployments_removeCustomDomain, leaving the agent to infer the domain-vs-subdomain distinction from the tool name alone.

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?

There is no guidance on when to use this versus setSlug, removeCustomDomain, or delete, and no stated prerequisites such as ownership or DNS state. The agent must infer the entire selection decision from the name.

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