AI agents call rc_list_sessions 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 retrieves and queries existing root cause analysis sessions with optional filtering. It has no side effects, does not modify data, execute code, or delete anything. It is a straightforward read operation that returns information to the user.
From the tool's definition Tool name contains 'list' and description states 'List all RCA sessions' — a pure retrieval operation with no modification, deletion, or execution of commands.
Attacks that exploit this kind of access
List all RCA sessions with optional filters. 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_list_sessions: 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_list_sessions 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_list_sessions 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_list_sessions. 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_list_sessions 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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