move_files_by_glob · Demo MCP: Risk & Policy

WHAT IT DOES

What move_files_by_glob does on Demo

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

WHY IT NEEDS A POLICY

Why move_files_by_glob needs a policy

Moving files is a reversible write operation that modifies data locations without permanent deletion. While the operation affects the filesystem, files can be moved back or recovered. This is categorized as Write rather than Destructive because the data itself is not deleted or overwritten—only its location changes.

From the tool's definition Tool description states: 'Move all files matching a glob pattern from source_dir into destination_dir.' This is a file movement operation that modifies the filesystem by relocating files.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

move_files_by_glob Rate-limited

move_files_by_glob 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": {
    "move_files_by_glob": {
      "limits": [
        {
          "counter": "move_files_by_glob_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 Demo, so you can run agents against it safely.

FAQ

Questions about move_files_by_glob

What does the move_files_by_glob tool do? +

Move all files matching a glob pattern from source_dir into destination_dir. It is categorised as a Write tool in the Demo MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on move_files_by_glob? +

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

What risk level is move_files_by_glob? +

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

Can I rate-limit move_files_by_glob? +

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

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

move_files_by_glob is provided by the Demo MCP server (penguinszp001/mcp-server-demo). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.