Retrieve users in the Linear workspace
AI agents call list_users to retrieve information from Linear MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves/lists user information without creating, modifying, or deleting any data. It is a straightforward query operation with minimal blast radius if misused by an AI agent—exposing a list of workspace users is a standard informational read.
From the tool's definition Tool name 'list_users' and description 'Retrieve users in the Linear workspace' indicate a read-only query operation with no data modification or side effects.
Attacks that exploit this kind of access
Retrieve users in the Linear workspace. It is categorised as a Read tool in the Linear MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Linear MCP Server MCP server in PolicyLayer and add a rule for 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 Linear MCP Server. Nothing to install.
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 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 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.
list_users is provided by the Linear MCP Server MCP server (sylphxai/linear-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
list_users is one line of Linear MCP Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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