List all installed MCP servers
AI agents call list_mcp to retrieve information from MCP Secure Installer 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 installed MCP servers without creating, modifying, deleting, or executing anything. It is a read-only operation with minimal security impact—an agent listing MCP servers cannot cause damage through this action alone.
From the tool's definition Tool name 'list_mcp' and description 'List all installed MCP servers' indicate a query/retrieval operation with no side effects.
Attacks that exploit this kind of access
List all installed MCP servers. It is categorised as a Read tool in the MCP Secure Installer MCP Server, which means it retrieves data without modifying state.
Register the MCP Secure Installer MCP server in PolicyLayer and add a rule for list_mcp: 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 MCP Secure Installer. Nothing to install.
list_mcp 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_mcp 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_mcp. 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_mcp is provided by the MCP Secure Installer MCP server (mossaka/mcp-sinstaller). 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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