List files in a pull request with parsed diff hunks for line resolution.
AI agents call github_pr_files to retrieve information from Promethean OS MCP 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 information about files changed in a PR, including diff hunks for analysis. It performs no modifications, deletions, or external operations—purely informational read access to GitHub data. The parsed diff hunks are analysis artifacts, not state changes. Severity is low as misuse would only expose PR information already visible to authorized users.
From the tool's definition Tool name 'github_pr_files' and description 'List files in a pull request with parsed diff hunks for line resolution' indicate a retrieval operation that queries GitHub pull request metadata and file changes without modifying any data.
Attacks that exploit this kind of access
List files in a pull request with parsed diff hunks for line resolution. It is categorised as a Read tool in the Promethean OS MCP MCP Server, which means it retrieves data without modifying state.
Register the Promethean OS MCP server in PolicyLayer and add a rule for github_pr_files: 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 Promethean OS MCP. Nothing to install.
github_pr_files 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_pr_files 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_pr_files. 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_pr_files is provided by the Promethean OS MCP server (octave-commons/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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