get_ht_dcperiod
AI agents call get_ht_dcperiod to retrieve information from AlphaVantage MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Based on the naming convention and context of sibling tools on the AlphaVantage MCP server, this tool retrieves a technical indicator (HT_DCPERIOD - Hilbert Transform Dominant Cycle Period) from the financial API. It performs a read-only data retrieval with no side effects, modifying no state, and requiring no financial transactions or code execution.
From the tool's definition Tool name 'get_ht_dcperiod' follows the naming pattern of sibling tools (get_atr, get_adx, get_aroon, etc.) which are all technical indicator retrieval functions. The 'get_' prefix indicates a retrieval/query operation.
Attacks that exploit this kind of access
get_ht_dcperiod. It is categorised as a Read tool in the AlphaVantage MCP Server MCP Server, which means it retrieves data without modifying state.
Register the AlphaVantage MCP Server MCP server in PolicyLayer and add a rule for get_ht_dcperiod: 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 AlphaVantage MCP Server. Nothing to install.
get_ht_dcperiod 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_ht_dcperiod 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_ht_dcperiod. 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_ht_dcperiod is provided by the AlphaVantage MCP Server MCP server (lifejwang11/alphavantage-mcp). 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.
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