Fetches Hacker News beststories ranking from the public Firebase API and returns summaries, unlike get_top_stories front-page rank or get_new_stories chronological rank. ${PUBLIC_HN_BEHAVIOR} Use for high-quality/popular stories beyond the current front page; use search_stories for topic discover...
AI agents call get_best_stories to retrieve information from Universal Mcp Toolkit without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves data from a public API (Hacker News Firebase) and returns summaries to the user. It performs a query operation that does not create, modify, delete, or execute any actions. There is no capability to change data, trigger external operations with side effects, or incur financial obligations.
From the tool's definition Tool description explicitly states 'Fetches Hacker News beststories ranking from the public Firebase API and returns summaries'. The verb 'Fetches' and the action of retrieving and returning data indicates a read-only operation with no side effects.
Attacks that exploit this kind of access
Fetches Hacker News beststories ranking from the public Firebase API and returns summaries, unlike get_top_stories front-page rank or get_new_stories chronological rank. ${PUBLIC_HN_BEHAVIOR} Use for high-quality/popular stories beyond the current front page; use search_stories for topic discovery or get_item_thread for comments on one item. It is categorised as a Read tool in the Universal Mcp Toolkit MCP Server, which means it retrieves data without modifying state.
Register the Universal Mcp Toolkit MCP server in PolicyLayer and add a rule for get_best_stories: 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 Universal Mcp Toolkit. Nothing to install.
get_best_stories 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_best_stories 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_best_stories. 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_best_stories is provided by the Universal Mcp Toolkit MCP server (markgatcha/universal-mcp-toolkit). 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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