List registry destinations available to the current user.
AI agents call list_registries to retrieve information from PlugLayer MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool only lists available registry destinations, which is a read-only operation. No data is created, modified, deleted, or executed. Low severity as it only exposes metadata about registry destinations.
From the tool's definition 'List registry destinations available to the current user' — purely retrieves/queries data with no side effects
Attacks that exploit this kind of access
List registry destinations available to the current user. It is categorised as a Read tool in the PlugLayer MCP Server MCP Server, which means it retrieves data without modifying state.
Register the PlugLayer MCP Server MCP server in PolicyLayer and add a rule for list_registries: 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 PlugLayer MCP Server. Nothing to install.
list_registries 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_registries 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_registries. 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_registries is provided by the PlugLayer MCP Server MCP server (pluglayer/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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