AI agents call get_stats to retrieve information from Jikan without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and presents pre-computed statistical summaries of behavioral sessions (meditation, focus, exercise tracking data). It has no side effects, does not create, modify, or delete data, and does not execute external operations. It is a straightforward read/query operation with minimal blast radius—an AI agent misuse would at worst retrieve unwanted session statistics.
From the tool's definition The tool name 'get_stats' and description 'Get pre-computed session aggregates' indicate a retrieval operation that queries aggregate data without modification. The mention of 'Costs 1 credit' is a usage cost, not an operational side effect.
Attacks that exploit this kind of access
Get pre-computed session aggregates. Costs 1 credit. It is categorised as a Read tool in the Jikan MCP Server, which means it retrieves data without modifying state.
Register the Jikan MCP server in PolicyLayer and add a rule for get_stats: 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 Jikan. Nothing to install.
get_stats 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_stats 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_stats. 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_stats is provided by the Jikan MCP server (thunderrabbit/jikan). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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