Harvest knowledge from a single done-flow. Call this right after flow_update transitions a flow to done (the server
AI agents call knowledge_harvest to retrieve information from DevFlow MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs a data retrieval operation—extracting or collecting knowledge from an already-completed flow. There is no indication of modification, creation, deletion, code execution, or financial impact. The operation is read-only and has no side effects beyond returning information. Severity is low because querying completed workflow data presents minimal risk of misuse.
From the tool's definition Tool name is 'knowledge_harvest' and description indicates it retrieves/extracts knowledge 'from a single done-flow' after a flow transitions to done. The verb 'harvest' in this context means to collect or extract data without modifying it.
Attacks that exploit this kind of access
Harvest knowledge from a single done-flow. Call this right after flow_update transitions a flow to done (the server. It is categorised as a Read tool in the DevFlow MCP Server MCP Server, which means it retrieves data without modifying state.
Register the DevFlow MCP Server MCP server in PolicyLayer and add a rule for knowledge_harvest: 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 DevFlow MCP Server. Nothing to install.
knowledge_harvest 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 knowledge_harvest 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 knowledge_harvest. 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.
knowledge_harvest is provided by the DevFlow MCP Server MCP server (klausfreiberufler/devflow-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
knowledge_harvest is one line of DevFlow MCP Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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