stocks_by_tag

Gets stocks filtered by market category tag.

SERVEROpen Stocks MCP SOURCEopen-agent-tools/open-stocks-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/open-agent-tools-open-stocks-mcp/stocks-by-tag.md

WHAT IT DOES

What stocks_by_tag does on Open Stocks MCP

AI agents call stocks_by_tag to retrieve information from Open Stocks MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why stocks_by_tag is rated Low

This tool retrieves or queries stock market data based on filtering criteria (category tags). It has no side effects—it does not create, modify, delete, or execute trades. The action is purely informational and read-only, making it a Read category tool with low severity risk.

From the tool's definition Tool name 'stocks_by_tag' and description 'Gets stocks filtered by market category tag' indicate a query/retrieval operation with no modification or execution of trades.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs stocks_by_tag safely

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

stocks_by_tag Allowed

stocks_by_tag is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "stocks_by_tag": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Open Stocks MCP, apply this rule, and every stocks_by_tag call is checked against it from then on.

FAQ

Questions about stocks_by_tag

What does the stocks_by_tag tool do? +

Gets stocks filtered by market category tag. It is categorised as a Read tool in the Open Stocks MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on stocks_by_tag? +

Register the Open Stocks MCP server in PolicyLayer and add a rule for stocks_by_tag: 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 Open Stocks MCP. Nothing to install.

What risk level is stocks_by_tag? +

stocks_by_tag is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit stocks_by_tag? +

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

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

stocks_by_tag is provided by the Open Stocks MCP server (open-agent-tools/open-stocks-mcp). 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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