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's location, or network environment to give more relevant and personalized information.
AI agents call primer to retrieve information from Jina AI without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The primer tool is purely informational—it retrieves session metadata (time, location, network context) to inform response generation. It has no side effects, does not execute code or commands, and does not modify or delete any data. This is a straightforward Read operation with minimal security risk, as the information returned is already available to the server and used for normal session contextualization.
From the tool's definition Tool description states it 'Get up-to-date contextual information of the current session' to enable 'localized, time-aware responses.' The verbs used are passive retrieval operations: 'know the current time, user's location, or network environment.' No…
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, 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's location, or network environment to give more relevant and personalized information. It is categorised as a Read tool in the Jina AI MCP Server, which means it retrieves data without modifying state.
Register the Jina AI 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. 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 MCP server (jina). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Jina AI, 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 tools catalogued and risk-classified — across an index of 43,000+ MCP servers.