search_pdf_knowledge
AI agents call search_pdf_knowledge to retrieve information from Metis Public Health without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries data from a local PDF knowledge base with no capability to modify, delete, or execute arbitrary operations. It is a straightforward search/retrieval operation with no side effects or blast radius beyond information disclosure. The lack of a detailed description slightly reduces confidence, but the tool name and server context clearly indicate a Read operation.
From the tool's definition Tool name 'search_pdf_knowledge' indicates querying/retrieving information from indexed PDFs. The server description states it 'answers from the user's own indexed PDF library with page-level citations' and 'keeps all data on the user's machine'.
Attacks that exploit this kind of access
search_pdf_knowledge. It is categorised as a Read tool in the Metis Public Health MCP Server, which means it retrieves data without modifying state.
Register the Metis Public Health MCP server in PolicyLayer and add a rule for search_pdf_knowledge: 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 Metis Public Health. Nothing to install.
search_pdf_knowledge 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 search_pdf_knowledge 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 search_pdf_knowledge. 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.
search_pdf_knowledge is provided by the Metis Public Health MCP server (sveritg/metis_ph). 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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