symbol_select

A write tool on the MCP Trader MCP server.

SERVERMCP Trader Server SOURCEaf7007/mcp-trader

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/af7007-mcp-trader/symbol-select.md

WHAT IT DOES

What symbol_select does on MCP Trader Server

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

RISK

Why symbol_select is rated Medium

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

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs symbol_select safely

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

symbol_select Rate-limited

symbol_select 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": {
    "symbol_select": {
      "limits": [
        {
          "counter": "symbol_select_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 MCP Trader Server, apply this rule, and every symbol_select call is checked against it from then on.

FAQ

Questions about symbol_select

What does the symbol_select tool do? +

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

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

What risk level is symbol_select? +

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

Can I rate-limit symbol_select? +

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

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

symbol_select is provided by the MCP Trader Server MCP server (af7007/mcp-trader). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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