add_ip_block

Add a single IP address to the block list

SERVER20i MCP Server SOURCEcbrown35/20i-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/cbrown35-20i-mcp/add-ip-block.md

WHAT IT DOES

What add_ip_block does on 20i MCP Server

AI agents use add_ip_block to create or update resources in 20i MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your 20i MCP Server environment.

RISK

Why add_ip_block is rated Medium

The tool modifies firewall/access control configuration by adding an IP address to a block list. This is a reversible write operation (the block can be removed), not destructive. While it affects access control, the impact is scoped to a single IP address and the action is undoable.

From the tool's definition Tool description: 'Add a single IP address to the block list' — this creates a new blocking rule by adding data to a block list.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs add_ip_block safely

PolicyLayer is an MCP gateway: it sits between your AI agents and 20i MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For add_ip_block, this is the rule to start with:

add_ip_block Rate-limited

add_ip_block 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": {
    "add_ip_block": {
      "limits": [
        {
          "counter": "add_ip_block_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect 20i MCP Server, apply this rule, and every add_ip_block call is checked against it from then on.

FAQ

Questions about add_ip_block

What does the add_ip_block tool do? +

Add a single IP address to the block list. It is categorised as a Write tool in the 20i 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 add_ip_block? +

Register the 20i MCP Server MCP server in PolicyLayer and add a rule for add_ip_block: 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 20i MCP Server. Nothing to install.

What risk level is add_ip_block? +

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

Can I rate-limit add_ip_block? +

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

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

add_ip_block is provided by the 20i MCP Server MCP server (cbrown35/20i-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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