List all available tools in this MCP server
AI agents call listTools to retrieve information from Expo MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool merely queries and returns information about available tools on the MCP server. It has no side effects, does not modify data, does not execute code, and does not access application data. It is purely informational metadata retrieval, fitting the 'Read' category with low severity due to minimal blast radius—it cannot be misused to cause harm.
From the tool's definition Tool name 'listTools' and description 'List all available tools in this MCP server' indicate a read-only operation that retrieves metadata about available tools without modifying any state or executing operations.
Attacks that exploit this kind of access
List all available tools in this MCP server. It is categorised as a Read tool in the Expo MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Expo MCP Server MCP server in PolicyLayer and add a rule for listTools: 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 Expo MCP Server. Nothing to install.
listTools 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 listTools 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 listTools. 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.
listTools is provided by the Expo MCP Server MCP server (mattlemmone/file-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
listTools is one line of Expo MCP Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →