set_tool_enabled · Math MCP Server MCP: Risk & Policy

WHAT IT DOES

What set_tool_enabled does on Math MCP Server

AI agents use set_tool_enabled to create or update resources in Math MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Math MCP Server environment.

WHY IT NEEDS A POLICY

Why set_tool_enabled needs a policy

This tool creates or modifies configuration state (enabling/disabling tools). While reversible and not destructive, it alters system behavior and could be misused to disable security-critical tools or enable unauthorized functionality. The impact depends on which tool is being toggled, but the action itself is a Write operation that changes system state.

From the tool's definition Tool description states 'Enable or disable a math tool dynamically' — this modifies the runtime state/configuration of tools without requiring a restart, which is a reversible state change.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_tool_enabled Rate-limited

set_tool_enabled stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "set_tool_enabled": {
      "limits": [
        {
          "counter": "set_tool_enabled_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Math MCP Server, so you can run agents against it safely.

FAQ

Questions about set_tool_enabled

What does the set_tool_enabled tool do? +

Enable or disable a math tool dynamically without restart. It is categorised as a Write tool in the Math MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_tool_enabled? +

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

What risk level is set_tool_enabled? +

set_tool_enabled is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit set_tool_enabled? +

Yes. Add a rate_limit block to the set_tool_enabled 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 set_tool_enabled completely? +

Set action: deny in the PolicyLayer policy for set_tool_enabled. 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 set_tool_enabled? +

set_tool_enabled is provided by the Math MCP Server MCP server (y-nihat/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.