close_position

A write tool on the Alpaca MCP server.

SERVERAlpaca MCP Server SOURCEcliffsgpt/alpaca-mcp-clone

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/cliffsgpt-alpaca-mcp-clone/close-position.md

WHAT IT DOES

What close_position does on Alpaca MCP Server

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

RISK

Why close_position is rated Medium

An AI agent can call close_position faster than any human can review: one bad instruction and it creates or modifies resources in Alpaca MCP Server by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs close_position safely

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

close_position Rate-limited

close_position 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": {
    "close_position": {
      "limits": [
        {
          "counter": "close_position_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 Alpaca MCP Server, apply this rule, and every close_position call is checked against it from then on.

FAQ

Questions about close_position

What does the close_position tool do? +

close_position is a write tool on the Alpaca MCP Server MCP server. It is categorised as a Write tool in the Alpaca 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 close_position? +

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

What risk level is close_position? +

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

Can I rate-limit close_position? +

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

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

close_position is provided by the Alpaca MCP Server MCP server (cliffsgpt/alpaca-mcp-clone). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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