addAgentTag · Lofty MCP Server MCP: Risk & Policy

WHAT IT DOES

What addAgentTag does on Lofty MCP Server

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

WHY IT NEEDS A POLICY

Why addAgentTag needs a policy

This tool creates or modifies agent records by appending tags—a reversible write operation with no data deletion, code execution, or financial impact. The blast radius is limited to agent metadata. Severity is low because tag operations are easily undoable and have minimal side effects on core business operations.

From the tool's definition Tool name 'addAgentTag' indicates adding/appending tags to an agent record. Description states 'Add tags to an agent,' which is a create/modify operation on agent metadata.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

addAgentTag Rate-limited

addAgentTag 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": {
    "addAgentTag": {
      "limits": [
        {
          "counter": "addagenttag_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 Lofty MCP Server, so you can run agents against it safely.

FAQ

Questions about addAgentTag

What does the addAgentTag tool do? +

Add tags to an agent. It is categorised as a Write tool in the Lofty 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 addAgentTag? +

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

What risk level is addAgentTag? +

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

Can I rate-limit addAgentTag? +

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

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

addAgentTag is provided by the Lofty MCP Server MCP server (nerdsnipe-inc/lofty-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.