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mcp-cloudflare-crunchtools

by crunchtools

create_dns_record_tool

Create DNS records in a Cloudflare zone to direct web traffic and email, with support for A, AAAA, CNAME, MX, TXT, NS, SRV, and CAA types.

Instructions

Create a new DNS record.

Args: zone_id: Zone ID (32-character hex string) type: Record type (A, AAAA, CNAME, MX, TXT, NS, SRV, CAA) name: Record name (e.g., www, @, subdomain.example.com) content: Record content (IP address, target domain, etc.) ttl: TTL in seconds, 1 = auto (default: 1) proxied: Proxy through Cloudflare (default: false) priority: Priority for MX/SRV records comment: Optional comment

Returns: Created DNS record details

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
ttlNo
nameYes
typeYes
commentNo
contentYes
proxiedNo
zone_idYes
priorityNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed9 schema fields changedv0.5.1
    • removedInput schema / additionalProperties
      Removed value: -false
    • removedInput schema / properties / comment / description
      Removed value: -"Optional comment"
    • removedInput schema / properties / content / description
      Removed value: -"Record content (IP address, target domain, etc.)"
    • removedInput schema / properties / name / description
      Removed value: -"Record name (e.g., www, @, subdomain.example.com)"
    • removedInput schema / properties / priority / description
      Removed value: -"Priority for MX/SRV records"
    • removedInput schema / properties / proxied / description
      Removed value: -"Proxy through Cloudflare (default: false)"
    • removedInput schema / properties / ttl / description
      Removed value: -"TTL in seconds, 1 = auto (default: 1)"
    • removedInput schema / properties / type / description
      Removed value: -"Record type (A, AAAA, CNAME, MX, TXT, NS, SRV, CAA)"
    • removedInput schema / properties / zone_id / description
      Removed value: -"Zone ID (32-character hex string)"
  2. First observedv0.5.0

TDQS

A3.6/5.0
Behavior2/5

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

With no annotations, the description carries the full disclosure burden. It reveals that TTL 1 means auto and that records can be proxied, but says nothing about required permissions, whether creation fails or overwrites on duplicate names, or side effects on live traffic — significant gaps for a mutating tool.

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

Conciseness4/5

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

The args-style layout is front-loaded with the purpose and scannable per-parameter. It is slightly verbose (the return line is redundant given the output schema) but nothing is misplaced.

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

Completeness4/5

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

For an 8-parameter mutation tool, the parameter space is fully covered and the output schema covers returns. The only missing piece is behavioral context (auth/permissions, failure modes) that would matter for a write operation with no annotations.

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

Parameters5/5

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

Schema description coverage is 0%, yet the description documents all 8 parameters with formats, valid values, and defaults: hex zone_id, the full record-type enum, name examples, TTL auto meaning, and MX/SRV-specific priority. This compensates fully for the empty schema and would be hard to call correctly without it.

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?

States a specific verb and resource ('Create a new DNS record') with no ambiguity. Against siblings like list_dns_records_tool, get_dns_record_tool, update_dns_record_tool, and delete_dns_record_tool, the create operation is immediately distinguishable by both name and description.

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

Usage Guidelines2/5

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

No when-to-use guidance, no prerequisites, and no mention of alternatives such as update_dns_record_tool for modifying an existing record. Usage context is only weakly implied by the verb 'Create'.

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