tool_list

List all available MCP tools with names and descriptions. Use for tool discovery.

SERVER1MCP Server SOURCE1mcp-app/agent

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/1mcp-app-agent/tool-list.md

WHAT IT DOES

What tool_list does on 1MCP Server

AI agents call tool_list to retrieve information from 1MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why tool_list is rated Low

This tool performs a pure query/retrieval operation to enumerate available tools and their descriptions. It has no side effects, cannot modify system state, and does not execute external operations.

From the tool's definition The tool_list function description states 'List all available MCP tools with names and descriptions. Use for tool discovery.' This is a read-only operation that retrieves and displays metadata about available tools without modifying, executing, or deleting…

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs tool_list safely

PolicyLayer is an MCP gateway: it sits between your AI agents and 1MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For tool_list, this is the rule to start with:

tool_list Allowed

tool_list is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "tool_list": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect 1MCP Server, apply this rule, and every tool_list call is checked against it from then on.

FAQ

Questions about tool_list

What does the tool_list tool do? +

List all available MCP tools with names and descriptions. Use for tool discovery. It is categorised as a Read tool in the 1MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on tool_list? +

Register the 1MCP Server MCP server in PolicyLayer and add a rule for tool_list: 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 1MCP Server. Nothing to install.

What risk level is tool_list? +

tool_list is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit tool_list? +

Yes. Add a rate_limit block to the tool_list 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.

How do I block tool_list completely? +

Set action: deny in the PolicyLayer policy for tool_list. 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.

What MCP server provides tool_list? +

tool_list is provided by the 1MCP Server MCP server (1mcp-app/agent). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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