AI agents call list_rooms to retrieve information from ZMCPTools without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays a list of communication rooms with optional filtering and pagination capabilities. The verb 'list' and the lack of any mention of creation, modification, deletion, or execution actions clearly place it in the Read category.
From the tool's definition Tool name 'list_rooms' and description 'List communication rooms with filtering and pagination' indicate a retrieval operation that queries existing data without modification or side effects.
Documented attack patterns abuse exactly the kind of access list_rooms gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and ZMCPTools, and nothing reaches the server without passing your rules. This is the rule we recommend for list_rooms:
{
"version": "1",
"default": "deny",
"tools": {
"list_rooms": {}
}
}list_rooms is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List communication rooms with filtering and pagination. It is categorised as a Read tool in the ZMCPTools MCP Server, which means it retrieves data without modifying state.
Register the ZMCPTools MCP server in PolicyLayer and add a rule for list_rooms: 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 ZMCPTools. Nothing to install.
list_rooms 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_rooms 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_rooms. 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_rooms is provided by the ZMCPTools MCP server (zachhandley/zmcptools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 70 ZMCPTools tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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70 ZMCPTools tools catalogued and risk-classified — across an index of 42,500+ MCP servers.