update_file_metadata · MCP Memory Server MCP: Risk & Policy

WHAT IT DOES

What update_file_metadata does on MCP Memory Server

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

WHY IT NEEDS A POLICY

Why update_file_metadata needs a policy

This tool creates or modifies file metadata, which is reversible and has no permanent destructive effect. It does not delete data, execute code, or move money. The presence of approval status checks in sibling tools indicates the server architecture treats metadata updates as Write operations requiring oversight.

From the tool's definition Tool name 'update_file_metadata' and description 'Update AI metadata in a file' indicate modification of file metadata.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_file_metadata Rate-limited

update_file_metadata 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": {
    "update_file_metadata": {
      "limits": [
        {
          "counter": "update_file_metadata_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 MCP Memory Server, so you can run agents against it safely.

FAQ

Questions about update_file_metadata

What does the update_file_metadata tool do? +

Update AI metadata in a file. It is categorised as a Write tool in the MCP Memory 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 update_file_metadata? +

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

What risk level is update_file_metadata? +

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

Can I rate-limit update_file_metadata? +

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

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

update_file_metadata is provided by the MCP Memory Server MCP server (keleshteri/mcp-memory). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.