Lists all tenants in the specified database
AI agents call list-tenants to retrieve information from Nile without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and enumerates tenant data without modifying, deleting, or executing operations. It is a straightforward read operation on existing data. The low severity reflects that listing tenants poses minimal risk unless the tenant list itself contains highly sensitive information, but the operation itself is non-destructive and reversible.
From the tool's definition Tool name 'list-tenants' and description 'Lists all tenants in the specified database' indicate a query/retrieval operation with no side effects.
Documented attack patterns abuse exactly the kind of access list-tenants gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Nile, and nothing reaches the server without passing your rules. This is the rule we recommend for list-tenants:
{
"version": "1",
"default": "deny",
"tools": {
"list-tenants": {}
}
}list-tenants is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Lists all tenants in the specified database. It is categorised as a Read tool in the Nile MCP Server, which means it retrieves data without modifying state.
Register the Nile MCP server in PolicyLayer and add a rule for list-tenants: 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 Nile. Nothing to install.
list-tenants 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-tenants 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-tenants. 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-tenants is provided by the Nile MCP server (@niledatabase/nile-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Nile, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
11 Nile tools catalogued and risk-classified — across an index of 43,000+ MCP servers.