List retained JouleScope driver topics with current values and optional metadata.
AI agents call list_topics to retrieve information from Joulescope without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about JouleScope driver topics and their current values. It performs no modifications, deletions, or external operations—purely a data retrieval query. The blast radius of misuse is minimal; an agent could only learn about available topics and their states, not affect system behavior or data integrity.
From the tool's definition Tool name 'list_topics' and description 'List retained JouleScope driver topics with current values' indicates a retrieval operation with no side effects. The verb 'list' combined with 'with current values' describes querying/reading existing state.
Attacks that exploit this kind of access
List retained JouleScope driver topics with current values and optional metadata. It is categorised as a Read tool in the Joulescope MCP Server, which means it retrieves data without modifying state.
Register the Joulescope MCP server in PolicyLayer and add a rule for list_topics: 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 Joulescope. Nothing to install.
list_topics 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 list_topics 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 list_topics. 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.
list_topics is provided by the Joulescope MCP server (juanqui/joulescope-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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