Retrieves the current hot posts from a specified, publicly accessible subreddit.
AI agents call REDDIT_RETRIEVE_REDDIT_POST to retrieve information from Reddit without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
size | integer | — | The maximum number of posts to return. Default is 5. Set to 0 to retrieve all available posts (or the maximum allowed by the Reddit API for a single request, ty |
subreddit | string | — | The name of the subreddit from which to retrieve posts (e.g., 'popular', 'pics'). Do not include 'r/'. |
Parameters from the server's own tool schema.
This tool only queries and returns existing public data from Reddit with no side effects. Despite the server supporting write and destructive operations, this specific tool performs a read-only retrieval of hot posts from a public subreddit. The blast radius of misuse is minimal—the worst outcome would be fetching unwanted posts or metadata, with no data loss or unauthorized actions possible.
From the tool's definition Tool name and description both indicate retrieval: 'Retrieves the current hot posts from a specified, publicly accessible subreddit.' The verb 'Retrieves' and the focus on reading existing posts with no modification confirm this is a data query operation.
Documented attack patterns abuse exactly the kind of access REDDIT_RETRIEVE_REDDIT_POST gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Reddit, and nothing reaches the server without passing your rules. This is the rule we recommend for REDDIT_RETRIEVE_REDDIT_POST:
{
"version": "1",
"default": "deny",
"tools": {
"REDDIT_RETRIEVE_REDDIT_POST": {}
}
}REDDIT_RETRIEVE_REDDIT_POST is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Retrieves the current hot posts from a specified, publicly accessible subreddit. It is categorised as a Read tool in the Reddit MCP Server, which means it retrieves data without modifying state.
REDDIT_RETRIEVE_REDDIT_POST accepts 2 parameters: size, subreddit. The full parameter table on this page comes from the server's own tool schema.
Register the Reddit MCP server in PolicyLayer and add a rule for REDDIT_RETRIEVE_REDDIT_POST: 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. Nothing to install.
REDDIT_RETRIEVE_REDDIT_POST 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 REDDIT_RETRIEVE_REDDIT_POST 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 REDDIT_RETRIEVE_REDDIT_POST. 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.
REDDIT_RETRIEVE_REDDIT_POST is provided by the Reddit MCP server (reddit-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 26 Reddit tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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26 Reddit tools catalogued and risk-classified — across an index of 42,500+ MCP servers.