share_file · Enhanced MCP Server MCP: Risk & Policy

WHAT IT DOES

What share_file does on Enhanced MCP Server

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

WHY IT NEEDS A POLICY

Why share_file needs a policy

Sharing a file modifies its access control list, granting potentially sensitive data access to another user. This is a reversible write operation (permissions can be revoked), but the blast radius is high because it can expose confidential files or folders to unintended recipients. It does not delete or execute code, so Write is the appropriate category, but severity is high due to potential data exposure.

From the tool's definition 'Share a file or folder with a user' — grants access permissions to existing content

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

share_file Rate-limited

share_file 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": {
    "share_file": {
      "limits": [
        {
          "counter": "share_file_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 Enhanced MCP Server, so you can run agents against it safely.

FAQ

Questions about share_file

What does the share_file tool do? +

Share a file or folder with a user. It is categorised as a Write tool in the Enhanced 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 share_file? +

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

What risk level is share_file? +

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

Can I rate-limit share_file? +

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

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

share_file is provided by the Enhanced MCP Server MCP server (pbulbule13/mcpwithgoogle). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.