pr-view

Views a pull request by number, URL, or branch. Returns structured data with state, checks, review decision, diff stats, author, labels, draft status, assignees, milestone, and timestamps.

SERVERCargo SOURCEDave-London/Pare

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-cargo/pr-view.md

WHAT IT DOES

What pr-view does on Cargo

AI agents call pr-view to retrieve information from Cargo 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-view is rated Low

This tool retrieves and queries pull request metadata (state, checks, review decision, diff stats, author, labels, etc.) without side effects. It is a read-only operation that fetches information about a PR without creating, modifying, or deleting any data.

From the tool's definition Tool name 'pr-view' and description states it 'Views a pull request' and 'Returns structured data' — indicating data retrieval with no modification, deletion, or execution of external operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pr-view safely

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

pr-view Allowed

pr-view 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-view": {}
  }
}

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

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

FAQ

Questions about pr-view

What does the pr-view tool do? +

Views a pull request by number, URL, or branch. Returns structured data with state, checks, review decision, diff stats, author, labels, draft status, assignees, milestone, and timestamps. It is categorised as a Read tool in the Cargo MCP Server, which means it retrieves data without modifying state.

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

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

What risk level is pr-view? +

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

Can I rate-limit pr-view? +

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

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

pr-view is provided by the Cargo MCP server (Dave-London/Pare). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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