Sets up network access for an existing Atlas project. Accepts list of IP addresses or CIDR blocks.
AI agents use setup_atlas_network_access to create or update resources in MongoDB Atlas MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MongoDB Atlas MCP Server environment.
This tool creates or modifies network access control lists/firewall rules for MongoDB Atlas projects. While the change is reversible (rules can be updated or deleted later), it materially alters the security posture and connectivity permissions of database infrastructure. This constitutes a Write action rather than Execute (no arbitrary code execution) or Destructive (changes are not permanent/irreversible).
From the tool's definition Tool description states it 'Sets up network access for an existing Atlas project. Accepts list of IP addresses or CIDR blocks.' This modifies network access rules—a reversible configuration change to Atlas infrastructure.
Documented attack patterns abuse exactly the kind of access setup_atlas_network_access gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MongoDB Atlas MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for setup_atlas_network_access:
{
"version": "1",
"default": "deny",
"tools": {
"setup_atlas_network_access": {
"limits": [
{
"counter": "setup_atlas_network_access_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}setup_atlas_network_access stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Sets up network access for an existing Atlas project. Accepts list of IP addresses or CIDR blocks. It is categorised as a Write tool in the MongoDB Atlas MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the MongoDB Atlas MCP Server MCP server in PolicyLayer and add a rule for setup_atlas_network_access: 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.
setup_atlas_network_access is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the setup_atlas_network_access 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 setup_atlas_network_access. 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.
setup_atlas_network_access is provided by the MongoDB Atlas MCP Server MCP server (mongodb-developer/mcp-mongodb-atlas). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MongoDB Atlas MCP Server, 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.
6 MongoDB Atlas MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.