AI agents call open_pdf to retrieve information from MokuPDF without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool opens a PDF file for reading and processing. It retrieves file content without creating, modifying, or deleting data. The 'smart file finding' feature is analogous to a search/locate operation. No side effects beyond loading the file into memory for subsequent read operations.
From the tool's definition 'Open a PDF file for processing (supports smart file finding)' — opening/reading a file with no modification
Attacks that exploit this kind of access
Open a PDF file for processing (supports smart file finding). It is categorised as a Read tool in the MokuPDF MCP Server, which means it retrieves data without modifying state.
Register the MokuPDF MCP server in PolicyLayer and add a rule for open_pdf: 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 MokuPDF. Nothing to install.
open_pdf 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 open_pdf 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 open_pdf. 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.
open_pdf is provided by the MokuPDF MCP server (jameslovespancakes/mokupdf). 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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