add_code_examples · MCPatterns MCP: Risk & Policy

WHAT IT DOES

What add_code_examples does on MCPatterns

AI agents use add_code_examples 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 add_code_examples needs a policy

The tool modifies a pattern resource by adding code examples to it. This is a Write operation: it's reversible (examples can be removed via delete_code_examples), creates new sub-resources, and has no destructive or side-effect-triggering behavior.

From the tool's definition Tool description states 'Add new code examples to existing patterns' — this creates/appends data to an existing resource without deletion or overwrite.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_code_examples Rate-limited

add_code_examples 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": {
    "add_code_examples": {
      "limits": [
        {
          "counter": "add_code_examples_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 add_code_examples

What does the add_code_examples tool do? +

Add new code examples to existing patterns. 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 add_code_examples? +

Register the MCPatterns MCP server in PolicyLayer and add a rule for add_code_examples: 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 add_code_examples? +

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

Can I rate-limit add_code_examples? +

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

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

add_code_examples 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.