create-prompt-from-template

THE RISK

Medium Risk

Why create-prompt-from-template needs a policy

This tool creates new prompt files, which is a reversible Write operation. While it modifies the local filesystem by adding new files, this is not destructive (files can be deleted/edited later) and does not execute arbitrary code or have financial impact. Severity is medium because malicious prompt creation could seed prompts that later cause problems when executed, but the tool itself only performs file creation.

From the tool's definition Tool name 'create-prompt-from-template' and description 'Create a new prompt file from a template with variables' explicitly indicate creation of new data (a prompt file).

Documented attack patterns abuse exactly the kind of access create-prompt-from-template gives an agent:

POLICY

How to control create-prompt-from-template

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Prompt Manager, and nothing reaches the server without passing your rules. This is the rule we recommend for create-prompt-from-template:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create-prompt-from-template": {
      "limits": [
        {
          "counter": "create-prompt-from-template_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

create-prompt-from-template 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.

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

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EXPLORE

Related tools and policies

More MCP Prompt Manager tools

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All 33 MCP Prompt Manager tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about create-prompt-from-template

What does the create-prompt-from-template tool do? +

Create a new prompt file from a template with variables. It is categorised as a Write tool in the MCP Prompt Manager MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create-prompt-from-template? +

Register the MCP Prompt Manager MCP server in PolicyLayer and add a rule for create-prompt-from-template: 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 Prompt Manager. Nothing to install.

What risk level is create-prompt-from-template? +

create-prompt-from-template is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create-prompt-from-template? +

Yes. Add a rate_limit block to the create-prompt-from-template 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 create-prompt-from-template completely? +

Set action: deny in the PolicyLayer policy for create-prompt-from-template. 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 create-prompt-from-template? +

create-prompt-from-template is provided by the MCP Prompt Manager MCP server (tae4an/mcp-prompt-manager). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Prompt Manager tool call.

Start from MCP Prompt Manager, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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