pr-diff

Returns file-level diff statistics for a pull request. Use full=true for patch/hunk content, or nameOnly=true for just the changed file paths.

SERVERHttp SOURCE@paretools/http

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/io-github-dave-london-http/pr-diff.md

WHAT IT DOES

What pr-diff does on Http

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

RISK

Why pr-diff is rated Low

This tool retrieves and queries pull request diff information without creating, modifying, deleting, or executing anything. The presence of parameters like 'full=true' for expanded output and 'nameOnly=true' for filtered output confirms it is purely a data retrieval operation. No destructive, financial, or code execution capabilities are evident.

From the tool's definition Tool returns 'file-level diff statistics' and 'changed file paths' with optional patch/hunk content. These are read-only queries of pull request data with no modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pr-diff safely

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

pr-diff Allowed

pr-diff 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": {
    "pr-diff": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Http, apply this rule, and every pr-diff call is checked against it from then on.

FAQ

Questions about pr-diff

What does the pr-diff tool do? +

Returns file-level diff statistics for a pull request. Use full=true for patch/hunk content, or nameOnly=true for just the changed file paths. It is categorised as a Read tool in the Http MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on pr-diff? +

Register the Http MCP server in PolicyLayer and add a rule for pr-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 Http. Nothing to install.

What risk level is pr-diff? +

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

Can I rate-limit pr-diff? +

Yes. Add a rate_limit block to the pr-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 pr-diff completely? +

Set action: deny in the PolicyLayer policy for pr-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 pr-diff? +

pr-diff is provided by the Http MCP server (@paretools/http). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Http, and thousands of servers like it.

This server

All 202 Http tools →

Across the catalogue

The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →