Get up-to-date contextual information of the current session to provide localized, time-aware responses. Use this when you need to know the current time, user
AI agents call primer to retrieve information from Jina AI Remote MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool reads session context, timestamp, and user information to enable localized responses. It performs pure data retrieval with no side effects, no external commands, no data modification, and no irreversible actions. It is clearly a Read operation. Severity is low because misuse would only expose timing or user metadata already available to the agent in normal operation, posing minimal risk.
From the tool's definition Tool name 'primer' and description indicate it 'Get up-to-date contextual information of the current session' and 'know the current time, user' — retrieves session metadata and contextual state without modification or side effects.
Documented attack patterns abuse exactly the kind of access primer gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Jina AI Remote MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for primer:
{
"version": "1",
"default": "deny",
"tools": {
"primer": {}
}
}primer is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Get up-to-date contextual information of the current session to provide localized, time-aware responses. Use this when you need to know the current time, user. It is categorised as a Read tool in the Jina AI Remote MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Jina AI Remote MCP Server MCP server in PolicyLayer and add a rule for primer: 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 Jina AI Remote MCP Server. Nothing to install.
primer 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 primer 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 primer. 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.
primer is provided by the Jina AI Remote MCP Server MCP server (jina-ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Jina AI Remote MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
21 Jina AI Remote MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.