check_login
Check if the user is currently logged into Reddit via the browser extension.
What check_login does on Reddit Skills
AI agents call check_login to retrieve information from Reddit Skills without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why check_login is rated Low
This tool only reads the current authentication state of the user session. It has no capability to modify data, execute commands, delete information, or commit financial transactions. The blast radius of misuse is minimal — an attacker could only learn whether a user is logged in, which poses no direct harm. It is straightforward read-access behavior.
From the tool's definition The tool 'check_login' performs a query operation that retrieves login status without modifying any data or triggering side effects. The description explicitly states it 'Check[s] if the user is currently logged into Reddit' — a pure status inspection.
Attacks that exploit this kind of access
The rule that runs check_login safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Reddit Skills, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For check_login, this is the rule to start with:
check_login is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Reddit Skills, apply this rule, and every check_login call is checked against it from then on.
Questions about check_login
Check if the user is currently logged into Reddit via the browser extension. It is categorised as a Read tool in the Reddit Skills MCP Server, which means it retrieves data without modifying state.
Register the Reddit Skills MCP server in PolicyLayer and add a rule for check_login: 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 Reddit Skills. Nothing to install.
check_login 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 check_login 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 check_login. 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.
check_login is provided by the Reddit Skills MCP server (1146345502/reddit-skills). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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