AI agents use modify_order to create or update resources in Futu Stock MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Futu Stock MCP Server environment.
An AI agent can call modify_order faster than any human can review — one bad instruction and it creates or modifies resources in Futu Stock MCP Server by the hundred, each call as confident as the last.
Documented attack patterns abuse exactly the kind of access modify_order gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Futu Stock MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for modify_order:
{
"version": "1",
"default": "deny",
"tools": {
"modify_order": {
"limits": [
{
"counter": "modify_order_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}modify_order 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.
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Modify or cancel an existing order. It is categorised as a Write tool in the Futu Stock MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Futu Stock MCP Server MCP server in PolicyLayer and add a rule for modify_order: 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 Futu Stock MCP Server. Nothing to install.
modify_order is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the modify_order 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.
Set action: deny in the PolicyLayer policy for modify_order. 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.
modify_order is provided by the Futu Stock MCP Server MCP server (shuizhengqi1/futu-stock-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 44 Futu Stock MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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44 Futu Stock MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.