import_pattern · Strudel MCP: Risk & Policy

WHAT IT DOES

What import_pattern does on Strudel

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

WHY IT NEEDS A POLICY

Why import_pattern needs a policy

Importing a pattern modifies the session state by adding new content, making it a Write operation. Severity is medium because misuse could create unintended patterns or overwrite existing ones, but the effects are reversible (patterns can be deleted or modified).

From the tool's definition Tool is named 'import_pattern' and described as importing 'a pattern from specified format', which creates or adds new pattern data into the Strudel environment. This is a reversible data modification operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

import_pattern Rate-limited

import_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": {
    "import_pattern": {
      "limits": [
        {
          "counter": "import_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 Strudel, so you can run agents against it safely.

FAQ

Questions about import_pattern

What does the import_pattern tool do? +

Import a pattern from specified format. It is categorised as a Write tool in the Strudel MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on import_pattern? +

Register the Strudel MCP server in PolicyLayer and add a rule for import_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 Strudel. Nothing to install.

What risk level is import_pattern? +

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

Can I rate-limit import_pattern? +

Yes. Add a rate_limit block to the import_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 import_pattern completely? +

Set action: deny in the PolicyLayer policy for import_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 import_pattern? +

import_pattern is provided by the Strudel MCP server (utenadev/strudel-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.