cancel_all_stock_orders_tool

THE RISK

Critical Risk

Why cancel_all_stock_orders_tool needs a policy

Cancelling all open stock orders is an irreversible bulk action that immediately terminates every pending trade. This cannot be undone — once orders are cancelled, any market opportunity or strategic position they represented is permanently lost. The blast radius is critical because an AI agent misusing this tool could simultaneously wipe out an entire portfolio's pending orders across all positions.

From the tool's definition Cancels all open stock orders

Documented attack patterns abuse exactly the kind of access cancel_all_stock_orders_tool gives an agent:

POLICY

How to control cancel_all_stock_orders_tool

PolicyLayer is an MCP gateway — it sits between your AI agents and Open Stocks MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for cancel_all_stock_orders_tool:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "cancel_all_stock_orders_tool"
  ]
}

cancel_all_stock_orders_tool disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register Open Stocks MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Open Stocks MCP tools

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All 152 Open Stocks MCP tools →

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Go deeper

Critical-risk tools in Open Stocks MCP → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about cancel_all_stock_orders_tool

What does the cancel_all_stock_orders_tool tool do? +

Cancels all open stock orders. It is categorised as a Destructive tool in the Open Stocks MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on cancel_all_stock_orders_tool? +

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

cancel_all_stock_orders_tool is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit cancel_all_stock_orders_tool? +

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

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

cancel_all_stock_orders_tool 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.

Enforce policy on every Open Stocks MCP tool call.

Start from Open Stocks MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →