github_get_pr_diff
AI agents call github_get_pr_diff to retrieve information from GitHub Code Review Assistant without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Despite the empty description, the naming convention ('get_') and context strongly suggest this tool retrieves pull request diff information for analysis purposes. Retrieving a PR diff is a read-only operation with no side effects—it queries existing data to support code review workflows. No data is created, modified, deleted, or executed. This is characteristic of the Read category.
From the tool's definition Tool name is 'github_get_pr_diff'; the sibling tools and server context indicate this is part of a code review assistant that analyzes pull requests.
Attacks that exploit this kind of access
github_get_pr_diff. It is categorised as a Read tool in the GitHub Code Review Assistant MCP Server, which means it retrieves data without modifying state.
Register the GitHub Code Review Assistant MCP server in PolicyLayer and add a rule for github_get_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 GitHub Code Review Assistant. Nothing to install.
github_get_pr_diff 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 github_get_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.
Set action: deny in the PolicyLayer policy for github_get_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.
github_get_pr_diff is provided by the GitHub Code Review Assistant MCP server (sanjanaspanda/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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