List all fonts used in a PDF document with their properties. Args: - file_path (string): Absolute path to a local PDF file - response_format (
AI agents call inspect_fonts to retrieve information from Pdf Reader without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists information about fonts in a PDF document. It performs inspection and enumeration of existing data structures without side effects, modification, deletion, or execution of arbitrary code. The only input required is a file path, and the output is informational metadata about font properties.
From the tool's definition Tool name 'inspect_fonts' and description 'List all fonts used in a PDF document with their properties' indicate retrieval of metadata about font properties without modifying the PDF or executing external operations.
Attacks that exploit this kind of access
List all fonts used in a PDF document with their properties. Args: - file_path (string): Absolute path to a local PDF file - response_format (. It is categorised as a Read tool in the Pdf Reader MCP Server, which means it retrieves data without modifying state.
Register the Pdf Reader MCP server in PolicyLayer and add a rule for inspect_fonts: 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 Reader. Nothing to install.
inspect_fonts 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 inspect_fonts 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 inspect_fonts. 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.
inspect_fonts is provided by the Pdf Reader MCP server (shuji-bonji/pdf-reader-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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