AI agents call get_crypto_quotes to retrieve information from Alpaca without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool fetches crypto market data (quotes) without modifying state, executing code, or committing financial transactions. While the server overall enables trading operations, this specific tool appears to be a data retrieval utility with no side effects.
From the tool's definition Tool name 'get_crypto_quotes' indicates retrieval of cryptocurrency price/quote data. Description is empty, but the naming convention and context within a trading server (alongside tools like 'get_account_info', 'get_all_assets') strongly suggests a read-only…
Attacks that exploit this kind of access
get_crypto_quotes. It is categorised as a Read tool in the Alpaca MCP Server, which means it retrieves data without modifying state.
Register the Alpaca MCP server in PolicyLayer and add a rule for get_crypto_quotes: 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. Nothing to install.
get_crypto_quotes 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 get_crypto_quotes 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 get_crypto_quotes. 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.
get_crypto_quotes is provided by the Alpaca MCP server (mfoster5303-1/alpaca-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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