create-phrase · Phrases MCP Server MCP: Risk & Policy

WHAT IT DOES

What create-phrase does on Phrases MCP Server

AI agents use create-phrase to create or update resources in Phrases MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Phrases MCP Server environment.

WHY IT NEEDS A POLICY

Why create-phrase needs a policy

The tool creates a new phrase record, which is a classic Write operation—it modifies data but the change is reversible via the delete-phrase tool. No code execution, financial impact, or irreversible destruction occurs. Severity is low because phrase creation in an inspirational database poses minimal risk; worst case is an agent creates unwanted phrases that can be deleted.

From the tool's definition Tool name 'create-phrase' and description 'Creates a new phrase for an author' indicate a create operation, which is reversible data modification. The sibling tool 'delete-phrase' confirms deletion is supported, making this a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create-phrase Rate-limited

create-phrase 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create-phrase": {
      "limits": [
        {
          "counter": "create-phrase_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Phrases MCP Server, so you can run agents against it safely.

FAQ

Questions about create-phrase

What does the create-phrase tool do? +

Creates a new phrase for an author. It is categorised as a Write tool in the Phrases MCP Server 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-phrase? +

Register the Phrases MCP Server MCP server in PolicyLayer and add a rule for create-phrase: 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 Phrases MCP Server. Nothing to install.

What risk level is create-phrase? +

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

Can I rate-limit create-phrase? +

Yes. Add a rate_limit block to the create-phrase 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-phrase completely? +

Set action: deny in the PolicyLayer policy for create-phrase. 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-phrase? +

create-phrase is provided by the Phrases MCP Server MCP server (ronniemh/phrases-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.