read_file_base64

Read a remote file as base64 for binary-safe transfer.

SERVERMcp Control Plane SOURCEalbertik322-sudo/mcp-control-plane

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/mcp-control-plane/read-file-base64.md

WHAT IT DOES

What read_file_base64 does on Mcp Control Plane

AI agents call read_file_base64 to retrieve information from Mcp Control Plane without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why read_file_base64 is rated Low

The tool retrieves file content (encoded as base64) without side effects. However, severity is elevated to 'high' rather than 'low' because: (1) it accesses 'remote' files, suggesting network or system-level file access; (2) base64 encoding indicates it may handle binary or sensitive data; (3) on a control plane server managing Windows, Docker, MikroTik, and Home Assistant, unauthorized file reads could expose…

From the tool's definition Tool name is 'read_file_base64' and description states it 'Read[s] a remote file as base64'. This is explicitly a read operation with no modification or deletion of data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs read_file_base64 safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Control Plane, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For read_file_base64, this is the rule to start with:

read_file_base64 Allowed

read_file_base64 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": {
    "read_file_base64": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Control Plane, apply this rule, and every read_file_base64 call is checked against it from then on.

FAQ

Questions about read_file_base64

What does the read_file_base64 tool do? +

Read a remote file as base64 for binary-safe transfer. It is categorised as a Read tool in the Mcp Control Plane MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on read_file_base64? +

Register the Mcp Control Plane MCP server in PolicyLayer and add a rule for read_file_base64: 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 Mcp Control Plane. Nothing to install.

What risk level is read_file_base64? +

read_file_base64 is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit read_file_base64? +

Yes. Add a rate_limit block to the read_file_base64 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 read_file_base64 completely? +

Set action: deny in the PolicyLayer policy for read_file_base64. 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 read_file_base64? +

read_file_base64 is provided by the Mcp Control Plane MCP server (albertik322-sudo/mcp-control-plane). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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