List all users in the database
AI agents call list-users to retrieve information from MongoDB MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves user data from the MongoDB database without modifying, creating, or deleting any records. It is a pure read operation that returns existing data. The low severity reflects that exposure of a user list retrieval has minimal blast radius—it may reveal user identities but does not alter state or enable destructive actions.
From the tool's definition Tool name 'list-users' and description 'List all users in the database' indicate a retrieval operation with no side effects.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
List all users in the database. It is categorised as a Read tool in the MongoDB MCP Server MCP Server, which means it retrieves data without modifying state.
Register the MongoDB MCP Server MCP server in PolicyLayer and add a rule for list-users: 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 MongoDB MCP Server. Nothing to install.
list-users 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-users 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-users. 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-users is provided by the MongoDB MCP Server MCP server (jb-7-jay/learn-mcp-server-mongo). 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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