AI agents call jis_trust_score to retrieve information from Jis without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a data retrieval operation to fetch trust score information based on existing audit history. It has no side effects, does not execute code or commands, does not modify data, does not delete anything, and does not involve financial transactions.
From the tool's definition Tool description states 'Get the trust score' - a retrieval operation that queries audit history data without modifying or executing operations.
Attacks that exploit this kind of access
Get the trust score for a jis: identity based on TIBET audit history. It is categorised as a Read tool in the Jis MCP Server, which means it retrieves data without modifying state.
Register the Jis MCP server in PolicyLayer and add a rule for jis_trust_score: 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 Jis. Nothing to install.
jis_trust_score 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 jis_trust_score 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 jis_trust_score. 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.
jis_trust_score is provided by the Jis MCP server (jaspertvdm/mcp-server-jis). 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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