list_ct_authorities

List Certificate Authorities (CAs) tracked in Certificate Transparency logs.

SERVERCloudflare SOURCEhttps://builds.mcp.cloudflare.com/sse

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade D, identity verified Pull the record →

This record as markdown: /tools/cloudflare/list-ct-authorities.md

WHAT IT DOES

What list_ct_authorities does on Cloudflare

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

RISK

Why list_ct_authorities is rated Low

This tool performs a passive data retrieval operation with no side effects. It queries public Certificate Transparency logs to enumerate CAs, which is informational in nature. The severity is low because CT logs are publicly available, read-only resources; misuse would only expose already-public information.

From the tool's definition Tool name 'list_ct_authorities' and description 'List Certificate Authorities (CAs) tracked in Certificate Transparency logs' indicate a read-only query operation that retrieves public certificate transparency data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_ct_authorities safely

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

list_ct_authorities Allowed

list_ct_authorities 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": {
    "list_ct_authorities": {}
  }
}

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

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

FAQ

Questions about list_ct_authorities

What does the list_ct_authorities tool do? +

List Certificate Authorities (CAs) tracked in Certificate Transparency logs. It is categorised as a Read tool in the Cloudflare MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_ct_authorities? +

Register the Cloudflare MCP server in PolicyLayer and add a rule for list_ct_authorities: 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 Cloudflare. Nothing to install.

What risk level is list_ct_authorities? +

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

Can I rate-limit list_ct_authorities? +

Yes. Add a rate_limit block to the list_ct_authorities 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 list_ct_authorities completely? +

Set action: deny in the PolicyLayer policy for list_ct_authorities. 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 list_ct_authorities? +

list_ct_authorities is provided by the Cloudflare MCP server (https://builds.mcp.cloudflare.com/sse). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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