set_file_permissions · Claude MCP Server Integration MCP

WHAT IT DOES

What set_file_permissions does on Claude MCP Server Integration

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

WHY IT NEEDS A POLICY

Why set_file_permissions needs a policy

This tool modifies file permissions (chmod-equivalent operation), which is a reversible Write action that changes file metadata. While not destructive by itself, improper permission changes could escalate privileges or restrict access, making it high-severity due to potential for misuse in a multi-user or security-sensitive environment.

From the tool's definition Tool name 'set_file_permissions' and description 'ファイル権限を設定します' (sets file permissions in Japanese) indicates modification of file access control metadata.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_file_permissions Rate-limited

set_file_permissions 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": {
    "set_file_permissions": {
      "limits": [
        {
          "counter": "set_file_permissions_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 Claude MCP Server Integration, so you can run agents against it safely.

FAQ

Questions about set_file_permissions

What does the set_file_permissions tool do? +

ファイル権限を設定します. It is categorised as a Write tool in the Claude MCP Server Integration MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_file_permissions? +

Register the Claude MCP Server Integration MCP server in PolicyLayer and add a rule for set_file_permissions: 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 Claude MCP Server Integration. Nothing to install.

What risk level is set_file_permissions? +

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

Can I rate-limit set_file_permissions? +

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

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

set_file_permissions is provided by the Claude MCP Server Integration MCP server (mokemoke0821/claude-mcp-integration). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.