Get Atlas user by ID
AI agents call atlas_user_get_by_id to retrieve information from MongoDB Atlas MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves user information from MongoDB Atlas by ID. It performs a query operation that does not create, modify, delete, or execute any side-effecting operations. The blast radius of misuse is minimal—an agent could retrieve user details (names, emails, roles), which represents an unauthorized information disclosure risk, but is classified as Read.
From the tool's definition Tool name 'get_by_id' and description 'Get Atlas user by ID' indicate a retrieval operation with no modification or deletion of data.
Attacks that exploit this kind of access
Get Atlas user by ID. It is categorised as a Read tool in the MongoDB Atlas MCP Server MCP Server, which means it retrieves data without modifying state.
Register the MongoDB Atlas MCP Server MCP server in PolicyLayer and add a rule for atlas_user_get_by_id: 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 Atlas MCP Server. Nothing to install.
atlas_user_get_by_id 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 atlas_user_get_by_id 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 atlas_user_get_by_id. 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.
atlas_user_get_by_id is provided by the MongoDB Atlas MCP Server MCP server (montumodi/mongodb-atlas-mcp-server). 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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