Get upcoming IPO/secondary lockup expirations within a date window. Lockup
AI agents call get_lockup_expirations 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 historical and scheduled lockup expiration data from SEC filings—a straightforward query operation with no side effects. While the information could inform trading decisions, the tool itself performs no financial transactions, executions, or modifications. It is purely informational, placing it in the Read category with low severity.
From the tool's definition Tool name 'get_lockup_expirations' and description 'Get upcoming IPO/secondary lockup expirations within a date window' indicate data retrieval only. No modification, deletion, execution, or financial transaction capabilities are present.
Attacks that exploit this kind of access
Get upcoming IPO/secondary lockup expirations within a date window. Lockup. 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_lockup_expirations: 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_lockup_expirations 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_lockup_expirations 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_lockup_expirations. 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_lockup_expirations 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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