check_dkim

SERVERMcp Nettools SOURCEaaronckj/mcp-nettools

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/aaronckj-mcp-nettools/check-dkim.md

WHAT IT DOES

What check_dkim does on Mcp Nettools

AI agents call check_dkim to retrieve information from Mcp Nettools without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why check_dkim is rated Low

This is a read-only network diagnostic tool that retrieves published DKIM configuration data from DNS. It only queries information that is already publicly available via DNS TXT records and does not modify, execute, or delete anything. The blast radius of misuse is minimal - an attacker could enumerate DKIM configurations across domains, but cannot alter them or cause direct harm.

From the tool's definition Tool performs DNS TXT record lookup ('Looks up the TXT record') for DKIM public key verification. No modification, deletion, or execution of code/commands occurs. The operation is a pure query with no side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs check_dkim safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Nettools, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For check_dkim, this is the rule to start with:

check_dkim Allowed

check_dkim is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "check_dkim": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Nettools, apply this rule, and every check_dkim call is checked against it from then on.

FAQ

Questions about check_dkim

What does the check_dkim tool do? +

Check whether a DKIM public key is published for a domain and selector. Looks up the TXT record at selector._domainkey.domain. selector: DKIM selector name (e.g. 'google', 'mail', 'default', 's1'). nameserver: optional custom resolver IP. It is categorised as a Read tool in the Mcp Nettools MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on check_dkim? +

Register the Mcp Nettools MCP server in PolicyLayer and add a rule for check_dkim: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Mcp Nettools. Nothing to install.

What risk level is check_dkim? +

check_dkim is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit check_dkim? +

Yes. Add a rate_limit block to the check_dkim rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block check_dkim completely? +

Set action: deny in the PolicyLayer policy for check_dkim. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides check_dkim? +

check_dkim is provided by the Mcp Nettools MCP server (aaronckj/mcp-nettools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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