file-exists

Probe a path in the executor

SERVERExecutor Mcp Roblox SOURCEokenjioxx/executor-mcp-roblox

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/executor-mcp-roblox/file-exists.md

WHAT IT DOES

What file-exists does on Executor Mcp Roblox

AI agents call file-exists to retrieve information from Executor Mcp Roblox without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why file-exists is rated Low

Even though file-exists only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs file-exists safely

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

file-exists Allowed

file-exists is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "file-exists": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Executor Mcp Roblox, apply this rule, and every file-exists call is checked against it from then on.

FAQ

Questions about file-exists

What does the file-exists tool do? +

Probe a path in the executor. It is categorised as a Read tool in the Executor Mcp Roblox MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on file-exists? +

Register the Executor Mcp Roblox MCP server in PolicyLayer and add a rule for file-exists: 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 Executor Mcp Roblox. Nothing to install.

What risk level is file-exists? +

file-exists is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit file-exists? +

Yes. Add a rate_limit block to the file-exists 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 file-exists completely? +

Set action: deny in the PolicyLayer policy for file-exists. 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 file-exists? +

file-exists is provided by the Executor Mcp Roblox MCP server (okenjioxx/executor-mcp-roblox). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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