Get a PEP by number. Use query for excerpts; full body is capped by default.
AI agents call get_pep to retrieve information from PEP MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves Python Enhancement Proposal documents by their numeric identifier. It performs a simple lookup and returns document content without modifying, executing, or deleting any data. The capping of full body output and suggestion to use query for excerpts further confirms this is a read-only retrieval operation with minimal risk of misuse.
From the tool's definition Tool description states "Get a PEP by number" and "full body is capped by default", indicating retrieval of read-only documentation. Server description emphasizes "search, list, and retrieve" operations with "no side effects".
Attacks that exploit this kind of access
Get a PEP by number. Use query for excerpts; full body is capped by default. It is categorised as a Read tool in the PEP MCP Server MCP Server, which means it retrieves data without modifying state.
Register the PEP MCP Server MCP server in PolicyLayer and add a rule for get_pep: 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 PEP MCP Server. Nothing to install.
get_pep 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 get_pep 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 get_pep. 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.
get_pep is provided by the PEP MCP Server MCP server (ribbit-br/mcp-pep-server). 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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