AI agents call list-catalog-services to retrieve information from Consul MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs catalog enumeration, which is a read-only operation. It retrieves information about registered services but does not create, modify, delete, or trigger any actions. The blast radius of misuse is minimal — an agent might over-enumerate services or use the data for lateral reconnaissance, but no data is harmed and no commands are executed.
From the tool's definition Tool name is 'list-catalog-services' and description states 'List all services in the catalog' — a pure query operation that retrieves service metadata without modification or side effects.
Documented attack patterns abuse exactly the kind of access list-catalog-services gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Consul MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list-catalog-services:
{
"version": "1",
"default": "deny",
"tools": {
"list-catalog-services": {}
}
}list-catalog-services is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all services in the catalog. It is categorised as a Read tool in the Consul MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Consul MCP Server MCP server in PolicyLayer and add a rule for list-catalog-services: 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 Consul MCP Server. Nothing to install.
list-catalog-services 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-catalog-services 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-catalog-services. 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-catalog-services is provided by the Consul MCP Server MCP server (kocierik/consul-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Consul MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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25 Consul MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.