Get stocks that moved significantly after earnings reports on a given date.
AI agents call get_post_earnings_movers to retrieve information from Signal8 MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and analyzes historical stock price movements following earnings announcements. It has no side effects, does not modify data, execute code, or commit financial obligations. While it provides financial market intelligence that could inform investment decisions, the tool itself merely queries and returns data.
From the tool's definition Tool description states 'Get stocks that moved significantly after earnings reports' — a retrieval operation that queries historical market data. The verb 'Get' and absence of any mutation, deletion, or execution language indicate a read-only query.
Attacks that exploit this kind of access
Get stocks that moved significantly after earnings reports on a given date. It is categorised as a Read tool in the Signal8 MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Signal8 MCP Server MCP server in PolicyLayer and add a rule for get_post_earnings_movers: 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 Signal8 MCP Server. Nothing to install.
get_post_earnings_movers 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_post_earnings_movers 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_post_earnings_movers. 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_post_earnings_movers is provided by the Signal8 MCP Server MCP server (signal8ai/signal8-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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