This record as markdown: /tools/cbrown35-20i-mcp/list-domains.md
What list_domains does on 20i MCP Server
AI agents call list_domains to retrieve information from 20i MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why list_domains is rated Low
This tool performs a read-only operation that queries and returns a list of domains. It has no side effects, does not execute code or trigger external operations, does not modify data, and does not involve financial transactions. The blast radius of misuse is minimal—an attacker gains visibility into the domains associated with a reseller account but cannot modify or delete them.
From the tool's definition Tool name 'list_domains' and description 'List all domains in the reseller account' indicate a query operation that retrieves domain information without modifying or deleting data.
Attacks that exploit this kind of access
The rule that runs list_domains safely
PolicyLayer is an MCP gateway: it sits between your AI agents and 20i MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_domains, this is the rule to start with:
list_domains is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect 20i MCP Server, apply this rule, and every list_domains call is checked against it from then on.
Questions about list_domains
List all domains in the reseller account. It is categorised as a Read tool in the 20i MCP Server MCP Server, which means it retrieves data without modifying state.
Register the 20i MCP Server MCP server in PolicyLayer and add a rule for list_domains: 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 20i MCP Server. Nothing to install.
list_domains 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_domains 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_domains. 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_domains is provided by the 20i MCP Server MCP server (cbrown35/20i-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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