add_blacklist · Freqtrade- MCP: Risk & Policy

WHAT IT DOES

What add_blacklist does on Freqtrade-MCP

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

WHY IT NEEDS A POLICY

Why add_blacklist needs a policy

This tool creates or modifies data (the blacklist configuration) in a reversible manner, fitting the Write category. It rates high severity because modifying the blacklist can significantly alter the bot's trading pairs and thus its financial exposure and trading decisions, though it is reversible (pairs can be removed).

From the tool's definition add_blacklist: the tool name and description explicitly indicate it modifies the blacklist by adding a pair, which is a reversible configuration change to the bot's trading behavior.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_blacklist Rate-limited

add_blacklist 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_blacklist": {
      "limits": [
        {
          "counter": "add_blacklist_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 Freqtrade-MCP, so you can run agents against it safely.

FAQ

Questions about add_blacklist

What does the add_blacklist tool do? +

Add a pair to the blacklist. It is categorised as a Write tool in the Freqtrade-MCP 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_blacklist? +

Register the Freqtrade- MCP server in PolicyLayer and add a rule for add_blacklist: 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 Freqtrade-MCP. Nothing to install.

What risk level is add_blacklist? +

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

Can I rate-limit add_blacklist? +

Yes. Add a rate_limit block to the add_blacklist 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_blacklist completely? +

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

add_blacklist is provided by the Freqtrade- MCP server (worlddebugger/freqtrade-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.