compress_files

THE RISK

High Risk

Why compress_files needs a policy

This tool executes system commands (zip/tar) to compress files. While it doesn't delete original files or move money, it runs external OS-level tools whose effects depend on the arguments provided. It could be misused to exfiltrate data by packaging sensitive files into an archive, making it medium severity.

From the tool's definition Compress files into an archive. Supports zip, tar, and tar.gz formats. Requires appropriate tools (zip/tar) to be installed on the system.

Documented attack patterns abuse exactly the kind of access compress_files gives an agent:

POLICY

How to control compress_files

PolicyLayer is an MCP gateway — it sits between your AI agents and Claude TypeScript MCP Servers, and nothing reaches the server without passing your rules. This is the rule we recommend for compress_files:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "compress_files": {
      "limits": [
        {
          "counter": "compress_files_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

compress_files stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Claude TypeScript MCP Servers — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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All 84 Claude TypeScript MCP Servers tools →

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Go deeper

High-risk tools in Claude TypeScript MCP Servers → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about compress_files

What does the compress_files tool do? +

Compress files into an archive. Supports zip, tar, and tar.gz formats. Requires appropriate tools (zip/tar) to be installed on the system. It is categorised as a Execute tool in the Claude TypeScript MCP Servers MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on compress_files? +

Register the Claude TypeScript MCP Servers MCP server in PolicyLayer and add a rule for compress_files: 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 TypeScript MCP Servers. Nothing to install.

What risk level is compress_files? +

compress_files is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit compress_files? +

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

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

compress_files is provided by the Claude TypeScript MCP Servers MCP server (ukkz/claude-ts-mcps). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Claude TypeScript MCP Servers tool call.

Start from Claude TypeScript MCP Servers, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →