List all subreddits and users that have been scraped. Shows available data sources.
AI agents call list_scraped_sources to retrieve information from Reddit Scraper without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns metadata about previously scraped data sources without modifying, deleting, or executing any operations. It is a straightforward informational lookup that presents no risk of unintended data modification or external action. The low severity reflects minimal blast radius even if accessed by an unauthorized agent.
From the tool's definition Tool description explicitly states 'List all subreddits and users that have been scraped' and 'Shows available data sources' — pure retrieval with no modification or side effects.
Attacks that exploit this kind of access
List all subreddits and users that have been scraped. Shows available data sources. It is categorised as a Read tool in the Reddit Scraper MCP Server, which means it retrieves data without modifying state.
Register the Reddit Scraper MCP server in PolicyLayer and add a rule for list_scraped_sources: 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 Scraper. Nothing to install.
list_scraped_sources 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_scraped_sources 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_scraped_sources. 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_scraped_sources is provided by the Reddit Scraper MCP server (namanxajmera/mcp-reddit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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