list_visitors

List Central NAC visitor accounts (bounded by default).

SERVERAPI-Central SOURCEsecure-ssid/centralmcp

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/secure-ssid-centralmcp/list-visitors.md

WHAT IT DOES

What list_visitors does on API-Central

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

RISK

Why list_visitors is rated Low

This tool queries and returns visitor account information without creating, modifying, deleting, or executing actions. It is a straightforward data retrieval operation with no side effects, fitting the Read category. The 'bounded by default' qualifier further suggests safety constraints limiting scope.

From the tool's definition 'List Central NAC visitor accounts' - retrieves/queries existing visitor data with no modification capability. The term 'List' and 'bounded by default' indicate a read-only query operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_visitors safely

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

list_visitors Allowed

list_visitors 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": {
    "list_visitors": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect API-Central, apply this rule, and every list_visitors call is checked against it from then on.

FAQ

Questions about list_visitors

What does the list_visitors tool do? +

List Central NAC visitor accounts (bounded by default). It is categorised as a Read tool in the API-Central MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_visitors? +

Register the API-Central MCP server in PolicyLayer and add a rule for list_visitors: 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 API-Central. Nothing to install.

What risk level is list_visitors? +

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

Can I rate-limit list_visitors? +

Yes. Add a rate_limit block to the list_visitors 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 list_visitors completely? +

Set action: deny in the PolicyLayer policy for list_visitors. 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 list_visitors? +

list_visitors is provided by the API-Central MCP server (secure-ssid/centralmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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