AI agents call linear_list_users to retrieve information from Sage MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves/queries user information from a Linear organization without creating, modifying, or deleting any data. It has no side effects and poses minimal risk even if misused by an AI agent—at worst, it reveals organizational membership which is typically non-sensitive or already discoverable through other means.
From the tool's definition Tool name 'linear_list_users' and description 'List users in the Linear organization' indicate a retrieval operation with no side effects. The verb 'list' is a classic Read operation that queries data without modification.
Documented attack patterns abuse exactly the kind of access linear_list_users gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Sage MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for linear_list_users:
{
"version": "1",
"default": "deny",
"tools": {
"linear_list_users": {}
}
}linear_list_users is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List users in the Linear organization. It is categorised as a Read tool in the Sage MCP MCP Server, which means it retrieves data without modifying state.
Register the Sage MCP server in PolicyLayer and add a rule for linear_list_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 Sage MCP. Nothing to install.
linear_list_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 linear_list_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 linear_list_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.
linear_list_users is provided by the Sage MCP server (sagemcp/sagemcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 359 Sage MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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359 Sage MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.