Obtain the list of notifications that the user is subscripted
AI agents call get-webhook-subscriptions to retrieve information from HeadHunter API MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns existing webhook subscription data. It performs a read-only operation that retrieves information about which notifications a user has subscribed to, with no side effects, data modification, code execution, or destructive actions. The low severity reflects minimal risk if misused—an agent could only access notification subscription metadata, not trigger harmful actions.
From the tool's definition Tool name 'get-webhook-subscriptions' and description 'Obtain the list of notifications that the user is subscripted' indicate a retrieval operation with no modification or execution of external code.
Attacks that exploit this kind of access
Obtain the list of notifications that the user is subscripted. It is categorised as a Read tool in the HeadHunter API MCP Server MCP Server, which means it retrieves data without modifying state.
Register the HeadHunter API MCP Server MCP server in PolicyLayer and add a rule for get-webhook-subscriptions: 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 HeadHunter API MCP Server. Nothing to install.
get-webhook-subscriptions 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-webhook-subscriptions 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-webhook-subscriptions. 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-webhook-subscriptions is provided by the HeadHunter API MCP Server MCP server (sargonpiraev/hh-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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