Get new posts from a subreddit. Returns cleaned data in TOON format.
AI agents call get_subreddit_new to retrieve information from Reddit 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 and queries subreddit data (new posts) without creating, modifying, deleting, or executing any operations. It is a read-only operation consistent with other sibling tools like get_subreddit_hot and get_subreddit_top. The return of data in TOON format confirms passive data retrieval with no side effects.
From the tool's definition Tool name 'get_subreddit_new' and description 'Get new posts from a subreddit. Returns cleaned data' indicates retrieval of publicly available Reddit posts with no modification or deletion of data.
Attacks that exploit this kind of access
Get new posts from a subreddit. Returns cleaned data in TOON format. It is categorised as a Read tool in the Reddit MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Reddit MCP Server MCP server in PolicyLayer and add a rule for get_subreddit_new: 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 MCP Server. Nothing to install.
get_subreddit_new 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 get_subreddit_new 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 get_subreddit_new. 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.
get_subreddit_new is provided by the Reddit MCP Server MCP server (jing-yilin/reddit-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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