get_ht_phasor
AI agents call get_ht_phasor 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.
The tool retrieves technical indicator data from AlphaVantage's financial API. Despite the empty description, the naming convention and context of sibling tools strongly suggest this is a read-only data query operation. While it accesses financial data, it performs no writes, executions, deletions, or financial transactions.
From the tool's definition Tool name 'get_ht_phasor' follows the naming pattern of sibling tools (get_ad, get_adosc, get_adx, etc.) which are technical indicator retrievals. The 'get_' prefix indicates data retrieval with no side effects.
Attacks that exploit this kind of access
get_ht_phasor. 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_phasor: 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_phasor 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_phasor 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_phasor. 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_phasor 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.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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