Tool mirror of trading://symbols/active resource for universal client compatibility.
AI agents call resource_symbols_active_tool to retrieve information from Alpaca MCP Gold Standard without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a data retrieval tool that queries active symbols for market data purposes. It has no side effects, does not execute trades, does not modify state, and does not commit financial transactions. The 'active' resource typically provides a list or reference data set used for market lookups.
From the tool's definition Tool description indicates it mirrors a 'symbols/active resource', which retrieves active trading symbols without modification. The resource name (read-only pattern) and 'mirror' language suggest data retrieval only.
Attacks that exploit this kind of access
Tool mirror of trading://symbols/active resource for universal client compatibility. It is categorised as a Read tool in the Alpaca MCP Gold Standard MCP Server, which means it retrieves data without modifying state.
Register the Alpaca MCP Gold Standard MCP server in PolicyLayer and add a rule for resource_symbols_active_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 Alpaca MCP Gold Standard. Nothing to install.
resource_symbols_active_tool is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the resource_symbols_active_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.
Set action: deny in the PolicyLayer policy for resource_symbols_active_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.
resource_symbols_active_tool is provided by the Alpaca MCP Gold Standard MCP server (joravetz/alpaca-mcp-gold). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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