List all available Gemini CLI extensions.
AI agents call gemini_list_extensions to retrieve information from Gemini CLI MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays information about available extensions without modifying, executing, or deleting any data. It is a straightforward informational read operation with minimal risk if misused by an AI agent.
From the tool's definition Tool name 'gemini_list_extensions' and description 'List all available Gemini CLI extensions' indicate a query/list operation with no side effects.
Attacks that exploit this kind of access
List all available Gemini CLI extensions. It is categorised as a Read tool in the Gemini CLI MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Gemini CLI MCP Server MCP server in PolicyLayer and add a rule for gemini_list_extensions: 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 Gemini CLI MCP Server. Nothing to install.
gemini_list_extensions 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 gemini_list_extensions 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 gemini_list_extensions. 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.
gemini_list_extensions is provided by the Gemini CLI MCP Server MCP server (wminson/gemini_mcp_server). 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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