create_patterns · MCPatterns MCP: Risk & Policy

WHAT IT DOES

What create_patterns does on MCPatterns

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

WHY IT NEEDS A POLICY

Why create_patterns needs a policy

This tool creates and persists new records in a database. It is a Write operation because it modifies data reversibly—patterns can be updated or deleted later (as evidenced by sibling tools 'delete_patterns' and 'delete_code_examples').

From the tool's definition Tool name 'create_patterns' with description 'Create multiple new coding patterns in the database' indicates data creation and storage operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_patterns Rate-limited

create_patterns 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_patterns": {
      "limits": [
        {
          "counter": "create_patterns_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 MCPatterns, so you can run agents against it safely.

FAQ

Questions about create_patterns

What does the create_patterns tool do? +

Create multiple new coding patterns in the database. It is categorised as a Write tool in the MCPatterns 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_patterns? +

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

What risk level is create_patterns? +

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

Can I rate-limit create_patterns? +

Yes. Add a rate_limit block to the create_patterns 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_patterns completely? +

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

create_patterns is provided by the MCPatterns MCP server (nicholasrubright/mcpatterns). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.