Search YouTube for creators in a niche, ranked by views-per-subscriber (median across surfaced videos). Returns each creator\
AI agents call youtube-search-creators to retrieve information from Ad Library MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves publicly available information about YouTube creators and their engagement metrics. It has no side effects, cannot modify data, and poses minimal risk if misused by an AI agent—worst case, it returns irrelevant creator recommendations. Classified as Read with low severity.
From the tool's definition Tool performs a search operation on YouTube to discover creators and retrieve ranking metrics (views-per-subscriber). Returns data without modifying or deleting anything. Description indicates 'Search' and 'Returns', both read-only operations.
Attacks that exploit this kind of access
Search YouTube for creators in a niche, ranked by views-per-subscriber (median across surfaced videos). Returns each creator\. It is categorised as a Read tool in the Ad Library MCP MCP Server, which means it retrieves data without modifying state.
Register the Ad Library MCP server in PolicyLayer and add a rule for youtube-search-creators: 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 Ad Library MCP. Nothing to install.
youtube-search-creators 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 youtube-search-creators 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 youtube-search-creators. 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.
youtube-search-creators is provided by the Ad Library MCP server (thedavidquan01/ad-library-mcp). 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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