Extract RVF contents
AI agents call rvf_extract to retrieve information from Claude Flow without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries RVF contents without side effects. No creation, modification, deletion, or external execution is implied. The sibling tools (agent_*, agentdb_*) suggest a management/orchestration context, but this specific tool's function is limited to extraction/reading. Classified as Read with low severity because misuse would only expose data, not cause operational harm or financial loss.
From the tool's definition Tool name 'rvf_extract' and description 'Extract RVF contents' indicate retrieval of data from RVF (likely a file or data structure format). The verb 'extract' denotes reading/accessing existing content without modification.
Attacks that exploit this kind of access
Extract RVF contents. It is categorised as a Read tool in the Claude Flow MCP Server, which means it retrieves data without modifying state.
Register the Claude Flow MCP server in PolicyLayer and add a rule for rvf_extract: 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 Claude Flow. Nothing to install.
rvf_extract 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 rvf_extract 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 rvf_extract. 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.
rvf_extract is provided by the Claude Flow MCP server (claude-flow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.