AI agents call rc_suggest_hfacs to retrieve information from Rootcause without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool analyzes a cause description and returns suggested HFACS-MES (Human Factors Analysis and Classification System for Medical Events) classification codes. This is a lookup/suggestion operation with no side effects—it does not create, modify, delete, or execute anything. It reads input and provides analytical output, fitting the Read category.
From the tool's definition Tool performs classification suggestion based on input; returns categorization codes without modifying, deleting, or executing external operations.
Attacks that exploit this kind of access
Suggest HFACS-MES classification codes for a cause description. It is categorised as a Read tool in the Rootcause MCP Server, which means it retrieves data without modifying state.
Register the Rootcause MCP server in PolicyLayer and add a rule for rc_suggest_hfacs: 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 Rootcause. Nothing to install.
rc_suggest_hfacs 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 rc_suggest_hfacs 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 rc_suggest_hfacs. 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.
rc_suggest_hfacs is provided by the Rootcause MCP server (u9401066/rootcause-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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