health_check
Health check for backend connectivity. Useful before running parse tools.
This record as markdown: /tools/0xpdf-mcp/health-check.md
What health_check does on 0xpdf
AI agents call health_check to retrieve information from 0xpdf without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why health_check is rated Low
Health checks are informational queries that test connectivity and service availability without causing any state changes. This is a safe diagnostic operation with minimal blast radius—a miscall cannot harm data or infrastructure.
From the tool's definition Tool is named 'health_check' and described as performing a 'Health check for backend connectivity' with no side effects mentioned. It retrieves status information without modifying, deleting, or executing operations.
Attacks that exploit this kind of access
The rule that runs health_check safely
PolicyLayer is an MCP gateway: it sits between your AI agents and 0xpdf, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For health_check, this is the rule to start with:
health_check is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect 0xpdf, apply this rule, and every health_check call is checked against it from then on.
Questions about health_check
Health check for backend connectivity. Useful before running parse tools. It is categorised as a Read tool in the 0xpdf MCP Server, which means it retrieves data without modifying state.
Register the 0xpdf MCP server in PolicyLayer and add a rule for health_check: 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 0xpdf. Nothing to install.
health_check 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 health_check 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 health_check. 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.
health_check is provided by the 0xpdf MCP server (risha-max/0xpdf-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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