AI agents call search_users to retrieve information from Jira MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Searching for users is a read-only operation that queries existing data (user directory/profiles) with no side effects. The tool does not create, modify, delete, or execute anything. While it may expose user identity information, the blast radius is minimal in the context of a Jira MCP server where user search is a standard, low-risk operation. Classified as Read/low severity.
From the tool's definition Tool name is 'search_users' and description states it 'Search users by query' — this is a retrieval operation that returns user information without modifying or executing any actions.
Documented attack patterns abuse exactly the kind of access search_users gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Jira MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search_users:
{
"version": "1",
"default": "deny",
"tools": {
"search_users": {}
}
}search_users is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Search users by query. It is categorised as a Read tool in the Jira MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Jira MCP Server MCP server in PolicyLayer and add a rule for search_users: 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 Jira MCP Server. Nothing to install.
search_users 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 search_users 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 search_users. 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.
search_users is provided by the Jira MCP Server MCP server (redhat-community-ai-tools/jira-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Jira MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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30 Jira MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.