top_movers

Gets top 20 movers on Robinhood.

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/top-movers.md

WHAT IT DOES

What top_movers does on Open Stocks MCP

AI agents call top_movers 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 top_movers is rated Low

This tool retrieves and queries stock market data about top-performing securities without creating, modifying, deleting, or executing any trades or commands. It is purely informational. The low severity reflects minimal blast radius—misuse returns market data only, with no financial, destructive, or operational consequences.

From the tool's definition Tool name 'top_movers' and description 'Gets top 20 movers on Robinhood' indicate a data retrieval operation. The verb 'Gets' combined with 'top 20 movers' (market data) shows no modification, deletion, or execution of operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs top_movers 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 top_movers, this is the rule to start with:

top_movers Allowed

top_movers 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": {
    "top_movers": {}
  }
}

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 top_movers call is checked against it from then on.

FAQ

Questions about top_movers

What does the top_movers tool do? +

Gets top 20 movers on Robinhood. 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 top_movers? +

Register the Open Stocks MCP server in PolicyLayer and add a rule for top_movers: 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 top_movers? +

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

Can I rate-limit top_movers? +

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

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

top_movers 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.

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