write_source_files · Prowpt MCP Server MCP: Risk & Policy

WHAT IT DOES

What write_source_files does on Prowpt MCP Server

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

WHY IT NEEDS A POLICY

Why write_source_files needs a policy

This tool creates or modifies source code files in web applications hosted on Prowpt.ai. While reversible (Write category), it has high severity because modifying application source code could break functionality, introduce vulnerabilities, or alter application behavior in significant ways.

From the tool's definition Tool name 'write_source_files' and description 'Write or update one or more source files' explicitly indicate modification of source code files.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

write_source_files Rate-limited

write_source_files 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": {
    "write_source_files": {
      "limits": [
        {
          "counter": "write_source_files_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 Prowpt MCP Server, so you can run agents against it safely.

FAQ

Questions about write_source_files

What does the write_source_files tool do? +

Write or update one or more source files. It is categorised as a Write tool in the Prowpt MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on write_source_files? +

Register the Prowpt MCP Server MCP server in PolicyLayer and add a rule for write_source_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 Prowpt MCP Server. Nothing to install.

What risk level is write_source_files? +

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

Can I rate-limit write_source_files? +

Yes. Add a rate_limit block to the write_source_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 write_source_files completely? +

Set action: deny in the PolicyLayer policy for write_source_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 write_source_files? +

write_source_files is provided by the Prowpt MCP Server MCP server (prowptai/prowpt-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.