share_file

Share a file or folder with others

SERVERNcp SOURCE@portel/ncp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-portel-dev-ncp/share-file.md

WHAT IT DOES

What share_file does on Ncp

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

RISK

Why share_file is rated Medium

Sharing a file modifies access permissions or creates new associations (e.g., adding recipients, updating share settings), which constitutes data modification. While not destructive or irreversible like deletion, and lacking financial impact, it represents a Write operation that changes system state.

From the tool's definition Tool name 'share_file' and description 'Share a file or folder with others' indicates modification of access control or metadata through a sharing action.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs share_file safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Ncp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For share_file, this is the rule to start with:

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.

The button opens the PolicyLayer dashboard: create your workspace, connect Ncp, apply this rule, and every share_file call is checked against it from then on.

FAQ

Questions about share_file

What does the share_file tool do? +

Share a file or folder with others. It is categorised as a Write tool in the Ncp 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 Ncp 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 Ncp. 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 Ncp MCP server (@portel/ncp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Ncp, and thousands of servers like it.

This server

All 275 Ncp tools →

Across the catalogue

The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →