create_interaction · Reddit MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_interaction does on Reddit MCP Server

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

WHY IT NEEDS A POLICY

Why create_interaction needs a policy

The tool creates a new object (interaction) within a lesson structure, which is a reversible write operation. While it modifies lesson data and establishes a container for subsequent prompts, it does not execute external code, delete data irreversibly, or involve financial transactions.

From the tool's definition Tool description states it 'Create[s] an interaction (container for questions/exercises) for a lesson' with the caveat that 'This must be created before adding prompts.' This is clearly a data creation operation that modifies lesson structure.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_interaction Rate-limited

create_interaction 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_interaction": {
      "limits": [
        {
          "counter": "create_interaction_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 Reddit MCP Server, so you can run agents against it safely.

FAQ

Questions about create_interaction

What does the create_interaction tool do? +

Create an interaction (container for questions/exercises) for a lesson. Each lesson can have one interaction. This must be created before adding prompts. It is categorised as a Write tool in the Reddit 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_interaction? +

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

What risk level is create_interaction? +

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

Can I rate-limit create_interaction? +

Yes. Add a rate_limit block to the create_interaction 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_interaction completely? +

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

create_interaction is provided by the Reddit MCP Server MCP server (ozipi/brainloop-mcp-server-v2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.