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

Annotations already declare destructiveHint=true, idempotentHint=false and readOnlyHint=false, so the safety profile is structured. The description adds genuine context with an expiry behavior not present in annotations (removed automatically after 7 days) and states what is being destroyed. However, it does not state what happens if no verification exists, which matters given idempotentHint=false, so it adds value without fully covering the mutations' edge behavior.

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?

Two sentences, both front-loaded with the action and the resource first, then the selection criterion. There is no redundant restatement of the title and no filler.

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 single-parameter, fully documented tool with rich annotations and no output schema, the description supplies everything needed to choose and invoke it. The one gap: nothing about the outcome when the verification is already absent, which is relevant because the tool is flagged non-idempotent.

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% and the single parameter is documented in the schema as 'Subdomain ID (from list_subdomains)'. The description only alludes to it as 'one of your subdomains' and adds no format, sourcing, or scoping detail beyond the schema, so the baseline of 3 applies.

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 names a specific verb ('Take down') and a specific resource ('the Vercel ownership value that add_vercel_verification published'), and links that resource explicitly to its counterpart sibling tool. An agent can distinguish it from add_vercel_verification and from delete_dns_record without opening any schema.

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?

It gives a clear conditional for use ('when the value is no longer needed or was added by mistake') and hints at a when-not condition via the 7-day auto-expiry, which tells the agent that waiting is an alternative to acting. What is missing is an explicit pointer back to add_vercel_verification as the inverse operation, so the routing guidance is strong but not complete.

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