AI agents call pr_list_prs to retrieve information from Pr Review without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays pull request metadata and statistics. It performs no mutations, executions, or destructive operations. The blast radius of misuse is minimal—an agent could retrieve PR information it shouldn't access, but cannot modify repositories, trigger workflows, or cause financial harm.
From the tool's definition Tool name 'pr_list_prs' and description 'List all pull requests in a repository with stats' indicate a query/retrieval operation. Returns statistical data about PRs without modifying, executing, or deleting anything.
Attacks that exploit this kind of access
List all pull requests in a repository with stats (review threads, comments, changes). It is categorised as a Read tool in the Pr Review MCP Server, which means it retrieves data without modifying state.
Register the Pr Review MCP server in PolicyLayer and add a rule for pr_list_prs: 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 Pr Review. Nothing to install.
pr_list_prs is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the pr_list_prs 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.
Set action: deny in the PolicyLayer policy for pr_list_prs. 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.
pr_list_prs is provided by the Pr Review MCP server (thebtf/pr-review-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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