Get comments from a specific Reddit post
AI agents call get_post_comments 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 comment data from Reddit posts with no side effects, modifications, or ability to create, delete, or execute operations. It is a pure read operation that fits the Read category definition of retrieving or querying data without side effects.
From the tool's definition Tool description states 'Get comments from a specific Reddit post' and server description emphasizes 'read-only access to Reddit's API for browsing subreddits, reading posts and comments' with 'no posting capabilities'.
Attacks that exploit this kind of access
Get comments from a specific Reddit post. 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_post_comments: 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_post_comments 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_post_comments 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_post_comments. 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_post_comments is provided by the Reddit MCP Server MCP server (sumitroyyy/reddit_mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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