AI agents call get-metadata to retrieve information from Pdf without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves metadata (properties/information) from PDF files. Metadata operations are non-destructive queries that do not alter data, execute arbitrary code, or affect system state. This is a read-only operation with minimal security risk, as metadata typically contains only structural/informational attributes of the document.
From the tool's definition Tool name 'get-metadata' and description 'retrieve PDF file metadata information' indicate retrieval of document properties without modification, deletion, or code execution.
Documented attack patterns abuse exactly the kind of access get-metadata gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Pdf, and nothing reaches the server without passing your rules. This is the rule we recommend for get-metadata:
{
"version": "1",
"default": "deny",
"tools": {
"get-metadata": {}
}
}get-metadata is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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获取PDF文件的元数据信息. It is categorised as a Read tool in the Pdf MCP Server, which means it retrieves data without modifying state.
Register the Pdf MCP server in PolicyLayer and add a rule for get-metadata: 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 Pdf. Nothing to install.
get-metadata 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-metadata 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-metadata. 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-metadata is provided by the Pdf MCP server (saury1120/pdf-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 9 Pdf tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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9 Pdf tools catalogued and risk-classified — across an index of 42,500+ MCP servers.