return_energy_rental
Return (cancel) an active energy rental. As a renter, provide the receiver address.
This record as markdown: /tools/justlend-mcp-server-justlend/return-energy-rental.md
What return_energy_rental does on Justlend
AI agents call return_energy_rental to permanently remove resources in Justlend, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why return_energy_rental is rated Critical
An AI agent that decides to call return_energy_rental doesn't hesitate, doesn't double-check, and doesn't stop at one. Whatever it removes from Justlend is gone. There is no undo for destructive operations.
Attacks that exploit this kind of access
The rule that runs return_energy_rental safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Justlend, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For return_energy_rental, this is the rule to start with:
return_energy_rental is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Justlend, apply this rule, and every return_energy_rental call is checked against it from then on.
Questions about return_energy_rental
Return (cancel) an active energy rental. As a renter, provide the receiver address. It is categorised as a Destructive tool in the Justlend MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Justlend MCP server in PolicyLayer and add a rule for return_energy_rental: 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 Justlend. Nothing to install.
return_energy_rental is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the return_energy_rental 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 return_energy_rental. 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.
return_energy_rental is provided by the Justlend MCP server (justlend/mcp-server-justlend). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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