pmpt_diff

THE RISK

Low Risk

Why pmpt_diff needs a policy

The tool performs a diff/comparison operation between versions, which is a read-only operation that retrieves and displays differences without modifying any data. No side effects are implied.

From the tool's definition Compare two versions, or a version against the current working copy

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

POLICY

How to control pmpt_diff

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "pmpt_diff": {}
  }
}

pmpt_diff is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Pmpt tools

Destructive pmpt_squash Remove empty snapshots (no file changes) and renumber remaining versions sequentially. Use Destructive pmpt_graduate Graduate a project on pmptwiki — archives it with a Hall of Fame badge. The project can no Write pmpt_edit_plan Edit existing plan fields (productIdea, coreFeatures, techStack, additionalContext, projec Write pmpt_log_decision Record an architectural or technical decision in pmpt.md. Use this when making important c Write pmpt_plan Finalize the plan: submit collected answers to generate AI prompt and project docs (plan.m Write pmpt_publish Publish the project to pmptwiki.com. Non-interactive — just provide slug and optional meta Write pmpt_save Save a snapshot of .pmpt/docs/ files. Call after completing features, fixes, or milestones Write pmpt_update_doc Update pmpt.md: check off completed features, add progress notes, or backfill missing vers

All 14 Pmpt tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about pmpt_diff

What does the pmpt_diff tool do? +

Compare two versions, or a version against the current working copy. It is categorised as a Read tool in the Pmpt MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on pmpt_diff? +

Register the Pmpt MCP server in PolicyLayer and add a rule for pmpt_diff: 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 Pmpt. Nothing to install.

What risk level is pmpt_diff? +

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

Can I rate-limit pmpt_diff? +

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

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

pmpt_diff is provided by the Pmpt MCP server (pmptwiki/pmpt-cli). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Pmpt tool call.

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

CHECK YOUR STACK →