list_pull_requests

THE RISK

Low Risk

Why list_pull_requests needs a policy

The tool performs a query/list operation to retrieve pull request data. The verb 'list' and the absence of language indicating modification, deletion, or execution (create, update, delete, execute, run) clearly positions this as a Read operation. There is no data modification, code execution, or destructive capability.

From the tool's definition Tool name 'list_pull_requests' and description 'List and filter repository pull requests' indicate a retrieval operation with no side effects.

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

POLICY

How to control list_pull_requests

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

policy.json

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

list_pull_requests 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 MCP-Brave-Search — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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FAQ

Questions about list_pull_requests

What does the list_pull_requests tool do? +

List and filter repository pull requests. It is categorised as a Read tool in the MCP-Brave-Search MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_pull_requests? +

Register the MCP-Brave-Search MCP server in PolicyLayer and add a rule for list_pull_requests: 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 MCP-Brave-Search. Nothing to install.

What risk level is list_pull_requests? +

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

Can I rate-limit list_pull_requests? +

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

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

list_pull_requests is provided by the MCP-Brave-Search MCP server (modelcontextprotocol/servers-archived). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP-Brave-Search tool call.

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

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