AI agents call linear_get_viewer to retrieve information from Linearapp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about the currently authenticated user—a straightforward read operation with no side effects. The blast radius is minimal: exposing user information poses low risk since it typically returns only the authenticated user's own publicly-available or standard profile data. No state changes, code execution, or irreversible actions are involved.
From the tool's definition Tool name 'linear_get_viewer' combined with description 'Get information about the authenticated user' indicates a read-only operation that retrieves user profile data without modifying, executing, or deleting anything.
Attacks that exploit this kind of access
Get information about the authenticated user. It is categorised as a Read tool in the Linearapp MCP Server, which means it retrieves data without modifying state.
Register the Linearapp MCP server in PolicyLayer and add a rule for linear_get_viewer: 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 Linearapp. Nothing to install.
linear_get_viewer 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_get_viewer 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_get_viewer. 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_get_viewer is provided by the Linearapp MCP server (mcp-server-linearapp). 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.
Teams ship this data inside their own products. See what a licence covers →