update_pattern · PromptForge MCP Server MCP: Risk & Policy

WHAT IT DOES

What update_pattern does on PromptForge MCP Server

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

WHY IT NEEDS A POLICY

Why update_pattern needs a policy

This tool modifies stored patterns in the PromptForge library, which is a reversible write operation. It does not delete data (would be Destructive), execute arbitrary code (would be Execute), or involve financial transactions.

From the tool's definition Tool name 'update_pattern' and description 'Update or add a pattern in the library' indicate creation or modification of data (patterns) in a persistent storage system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_pattern Rate-limited

update_pattern 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": {
    "update_pattern": {
      "limits": [
        {
          "counter": "update_pattern_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 PromptForge MCP Server, so you can run agents against it safely.

FAQ

Questions about update_pattern

What does the update_pattern tool do? +

Update or add a pattern in the library. It is categorised as a Write tool in the PromptForge 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 update_pattern? +

Register the PromptForge MCP Server MCP server in PolicyLayer and add a rule for update_pattern: 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 PromptForge MCP Server. Nothing to install.

What risk level is update_pattern? +

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

Can I rate-limit update_pattern? +

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

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

update_pattern is provided by the PromptForge MCP Server MCP server (stevekaplanai/promptforge-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.