check_mongodb

SERVERMcp Nettools SOURCEaaronckj/mcp-nettools

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/aaronckj-mcp-nettools/check-mongodb.md

WHAT IT DOES

What check_mongodb does on Mcp Nettools

AI agents call check_mongodb to retrieve information from Mcp Nettools without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why check_mongodb is rated Low

The tool performs network diagnostics—specifically reachability verification of a MongoDB server—by sending a non-authenticated hello handshake. This is purely informational with no side effects, data access, or operational impact. It is analogous to ping or port-checking, which are standard Read category diagnostics.

From the tool's definition Tool description states it 'send[s] a hello command via the MongoDB wire protocol' and 'Returns whether the server is reachable and responds as a MongoDB instance' with explicit note that it 'Does not authenticate.' This is a diagnostic probe operation with…

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs check_mongodb safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Nettools, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For check_mongodb, this is the rule to start with:

check_mongodb Allowed

check_mongodb is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "check_mongodb": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Nettools, apply this rule, and every check_mongodb call is checked against it from then on.

FAQ

Questions about check_mongodb

What does the check_mongodb tool do? +

Connect to a MongoDB server and send a hello command via the MongoDB wire protocol (OP_MSG). Returns whether the server is reachable and responds as a MongoDB instance. Does not authenticate. Useful for verifying MongoDB/Atlas-compatible server availability. It is categorised as a Read tool in the Mcp Nettools MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on check_mongodb? +

Register the Mcp Nettools MCP server in PolicyLayer and add a rule for check_mongodb: 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 Mcp Nettools. Nothing to install.

What risk level is check_mongodb? +

check_mongodb is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit check_mongodb? +

Yes. Add a rate_limit block to the check_mongodb 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.

How do I block check_mongodb completely? +

Set action: deny in the PolicyLayer policy for check_mongodb. 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.

What MCP server provides check_mongodb? +

check_mongodb is provided by the Mcp Nettools MCP server (aaronckj/mcp-nettools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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