add_content · Memvid MCP: Risk & Policy

WHAT IT DOES

What add_content does on Memvid

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

WHY IT NEEDS A POLICY

Why add_content needs a policy

This tool creates or modifies project content by adding text documents. It is a Write operation because it introduces new data to the project in a reversible manner. The severity is low because adding content to a project has minimal blast radius and can be undone via deletion or modification.

From the tool's definition Tool description states 'Add a text document/content to the project' — a clear create/modify operation that adds new content reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_content Rate-limited

add_content 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_content": {
      "limits": [
        {
          "counter": "add_content_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 Memvid, so you can run agents against it safely.

FAQ

Questions about add_content

What does the add_content tool do? +

Add a text document/content to the project. It is categorised as a Write tool in the Memvid 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_content? +

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

What risk level is add_content? +

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

Can I rate-limit add_content? +

Yes. Add a rate_limit block to the add_content 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_content completely? +

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

add_content is provided by the Memvid MCP server (memvid-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.