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by io.github.mailercloud-com
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Delete Domain (preview, then confirm)

delete_domain
DestructiveIdempotent

Delete a sending domain. Senders on it can no longer send and this can't be undone; needs domain_id. Shows a preview first and deletes only with confirm: true.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "domain_id": "<domain_id>"
    },
    "name": "delete_domain"
  }
}

Input Schema

NameRequiredDescriptionDefault
confirmNoMust be true to make the change. Leave it out first to get a preview, show it to the user, and ask them to confirm
dry_runNoShow what would be deleted without deleting
domain_idYesDomain ID (from list_domains)

Schema Changelog

Changes observed during successful MCP inspections.

  1. Added

TDQS

A4.5/5.0
Behavior5/5

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

Annotations already flag destructiveHint=true and idempotentHint=true, but the description adds the blast radius that annotations cannot express: senders on the domain can no longer send. It also restates irreversibility ("can't be undone") and the two-step preview/confirm gate, which is exactly the operational context an agent needs before a destructive call.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences with no filler. The destructive consequence is front-loaded before the mechanical requirement (domain_id) and the confirmation protocol, which is the right order for a risky operation.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a three-parameter destructive tool with full schema coverage and annotations covering readOnly/destructive/idempotent hints, nothing essential is missing: consequence, irreversibility, required identifier, and the preview-confirm flow are all present. No output schema exists, so return-value detail is not needed.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, and the confirm and dry_run parameters are already documented in detail in the schema, including the preview-then-confirm instruction. The description only restates that domain_id is required and echoes the confirm semantics, so it does not add meaning beyond the structured fields.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

"Delete a sending domain" names a specific verb and a specific resource, which separates it cleanly from sibling mutations such as delete_sender, delete_list, delete_tag and from the non-destructive get_domain/list_domains/update_domain. An agent can identify the target object and operation without opening the schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description supplies a concrete calling workflow: pass domain_id, call without confirmation to get a preview, then re-call with confirm: true. That is real guidance on how to invoke it. It stops short of stating when not to delete (for example, when update_domain or verify_domain would be the better move), so no explicit alternative is named.

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

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