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

Annotations already disclose readOnlyHint=false, destructiveHint=false, and openWorldHint=true, so the agent knows this is a non-destructive action that reaches outside the system. The description's mention of DNS adds context that explains the open-world trait, but it says nothing about whether verification is asynchronous, what happens on failure, or whether it can be safely retried.

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?

A single front-loaded sentence with zero filler; the action verb and target are the first things read. Nothing could be removed without losing meaning.

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 mutation-style, open-world operation with no output schema, the description omits essential context: prerequisites (domain added, DNS records propagated), async vs. synchronous behavior, and what a successful or failed verification means. The annotations cover the safety profile but not the operational flow.

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% (both domainId and deploymentId are documented as UUIDs in the schema), so the schema carries the parameter burden. The description adds no additional meaning about how the two identifiers interact or which one scopes the verification.

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 pairs a specific verb ('Trigger DNS verification') with a clear resource ('custom domain'), so an agent knows exactly what action is performed. It is readily distinguishable from the domains_add/list/remove siblings, though it never names or contrasts them explicitly.

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 is given: it does not state that the domain must first be added via nexusai_domains_add, that DNS records must already be configured, or when a re-verification is appropriate versus other domain operations. The agent must infer all preconditions.

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