List supported DNS providers for DNS challenge certificates
AI agents call list_dns_providers to retrieve information from Nginx Proxy Manager MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or enumerates a static list of supported DNS providers used for SSL certificate DNS challenges. It performs no modifications, deletions, or executions. It is purely informational and has no blast radius if misused by an AI agent—listing providers cannot cause harm to infrastructure or data.
From the tool's definition Tool name 'list_dns_providers' and description 'List supported DNS providers' indicate a query/retrieval operation with no side effects.
Attacks that exploit this kind of access
List supported DNS providers for DNS challenge certificates. It is categorised as a Read tool in the Nginx Proxy Manager MCP MCP Server, which means it retrieves data without modifying state.
Register the Nginx Proxy Manager MCP server in PolicyLayer and add a rule for list_dns_providers: 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 Nginx Proxy Manager MCP. Nothing to install.
list_dns_providers is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_dns_providers 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.
Set action: deny in the PolicyLayer policy for list_dns_providers. 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.
list_dns_providers is provided by the Nginx Proxy Manager MCP server (verybigsad/nginx-proxy-manager-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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