save_checksum_file · Claude MCP Server Integration MCP

WHAT IT DOES

What save_checksum_file does on Claude MCP Server Integration

AI agents use save_checksum_file 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 save_checksum_file needs a policy

This tool creates or modifies a file to store checksum data. It is reversible (the file can be deleted or overwritten), so it falls under Write rather than Destructive. The severity is medium because uncontrolled file writes in the filesystem could consume disk space, overwrite important files, or interfere with system operations if an agent misbehaves—but the risk is lower than Execute or Destructive categories.

From the tool's definition Tool name 'save_checksum_file' and description 'チェックサム結果をファイルに保存します' (Save checksum results to file) indicates file creation/writing. The context confirms filesystem operations are enabled via this MCP server.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

save_checksum_file Rate-limited

save_checksum_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": {
    "save_checksum_file": {
      "limits": [
        {
          "counter": "save_checksum_file_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 save_checksum_file

What does the save_checksum_file tool do? +

チェックサム結果をファイルに保存します. 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 save_checksum_file? +

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

What risk level is save_checksum_file? +

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

Can I rate-limit save_checksum_file? +

Yes. Add a rate_limit block to the save_checksum_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 save_checksum_file completely? +

Set action: deny in the PolicyLayer policy for save_checksum_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 save_checksum_file? +

save_checksum_file 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.