Low Risk

list_languages

List the 4 supported output languages with file extensions and toolchains. Returns: Formatted list of languages with compilation instructions.

How to control list_languages ↓

AI agents call list_languages to retrieve information from Sysplant without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Low Risk

This tool returns informational data (supported languages, file extensions, toolchains) with no side effects, no code execution, no data modification, and no destructive operations. It is a simple enumeration/read operation analogous to 'list' or 'get' operations.

From the tool's definition Tool name 'list_languages' and description 'List the 4 supported output languages' indicates a query operation that retrieves static information about supported languages and their properties.

Documented attack patterns abuse exactly the kind of access list_languages gives an agent:

PolicyLayer is an MCP gateway — it sits between your AI agents and Sysplant, and nothing reaches the server without passing your rules. This is the rule we recommend for list_languages:

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_languages": {}
  }
}

list_languages is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

  1. Create a free account and register Sysplant — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
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Go deeper

What does the list_languages tool do? +

List the 4 supported output languages with file extensions and toolchains. Returns: Formatted list of languages with compilation instructions. It is categorised as a Read tool in the Sysplant MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_languages? +

Register the Sysplant MCP server in PolicyLayer and add a rule for list_languages: 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 Sysplant. Nothing to install.

What risk level is list_languages? +

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

Can I rate-limit list_languages? +

Yes. Add a rate_limit block to the list_languages 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_languages completely? +

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

list_languages is provided by the Sysplant MCP server (x42en/sysplant). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Sysplant tool call.

Deterministic rules across all 9 Sysplant tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

Free to start. No card required.

9 Sysplant tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

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