search
AI agents call search to retrieve information from YouTube Knowledge Base MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information from a searchable knowledge base of YouTube transcripts. Search operations are read-only with no side effects—they query existing data without creating, modifying, deleting, or executing external operations. The broader server context confirms the purpose is information retrieval ('search, organize, and retrieve').
From the tool's definition Tool named 'search' on a knowledge base server that 'allows LLM assistants to search, organize, and retrieve timestamped information from videos'; the operation is described as retrieval/search with no modification or deletion capability mentioned.
Attacks that exploit this kind of access
search. It is categorised as a Read tool in the YouTube Knowledge Base MCP MCP Server, which means it retrieves data without modifying state.
Register the YouTube Knowledge Base MCP server in PolicyLayer and add a rule for search: 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 YouTube Knowledge Base MCP. Nothing to install.
search 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 search 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 search. 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.
search is provided by the YouTube Knowledge Base MCP server (miandari/youtube-knowledge-base-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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