select_dealer · StockSpark MCP Server MCP: Risk & Policy

WHAT IT DOES

What select_dealer does on StockSpark MCP Server

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

WHY IT NEEDS A POLICY

Why select_dealer needs a policy

This tool changes application state by selecting/setting a dealer context, which is a write operation (modifying the current session state). However, it does not create, delete, or irreversibly modify persistent data, nor does it execute arbitrary code or move funds.

From the tool's definition Tool name 'select_dealer' and description 'Select a specific dealer within the current company' indicate a state-selection operation that modifies the current context or session state to point to a specific dealer.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

select_dealer Rate-limited

select_dealer 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": {
    "select_dealer": {
      "limits": [
        {
          "counter": "select_dealer_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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

FAQ

Questions about select_dealer

What does the select_dealer tool do? +

Select a specific dealer within the current company. It is categorised as a Write tool in the StockSpark 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 select_dealer? +

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

What risk level is select_dealer? +

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

Can I rate-limit select_dealer? +

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

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

select_dealer is provided by the StockSpark MCP Server MCP server (loukach/stockspark-mcp-poc). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.