add_related_item · Follow Plan MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_related_item does on Follow Plan MCP Server

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

WHY IT NEEDS A POLICY

Why add_related_item needs a policy

The tool creates or updates relationships between items within the project management system. While it modifies data (Write category), the action is reversible and has limited blast radius compared to destructive operations. Severity is medium because misuse could corrupt task/message relationships or create misleading project structure, but the actual project data remains intact and recoverable.

From the tool's definition Tool performs 'Add related item to a message', which modifies message metadata by linking related items. This is a reversible data modification operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_related_item Rate-limited

add_related_item 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_related_item": {
      "limits": [
        {
          "counter": "add_related_item_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 Follow Plan MCP Server, so you can run agents against it safely.

FAQ

Questions about add_related_item

What does the add_related_item tool do? +

Add related item to a message. It is categorised as a Write tool in the Follow Plan 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 add_related_item? +

Register the Follow Plan MCP Server MCP server in PolicyLayer and add a rule for add_related_item: 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 Follow Plan MCP Server. Nothing to install.

What risk level is add_related_item? +

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

Can I rate-limit add_related_item? +

Yes. Add a rate_limit block to the add_related_item 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_related_item completely? +

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

add_related_item is provided by the Follow Plan MCP Server MCP server (vibeclasses/follow-plan-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.