Downloads a specific YouTube caption track, which must be owned by the authenticated user, and returns its content as text. Note: This action requires you to own the video (YouTube Data API v3 restriction). Non-owned videos will return 403 Forbidden errors, including many auto-generated caption t...
Single-target operation
Part of the Youtube MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents call YOUTUBE_LOAD_CAPTIONS to retrieve information from Youtube without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though YOUTUBE_LOAD_CAPTIONS only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
tools:
YOUTUBE_LOAD_CAPTIONS:
rules:
- action: allowSee the full Youtube policy for all 36 tools.
Agents calling read-class tools like YOUTUBE_LOAD_CAPTIONS have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Read risk category across the catalogue. The same policy patterns (rate-limit, allow) apply to each.
Downloads a specific YouTube caption track, which must be owned by the authenticated user, and returns its content as text. Note: This action requires you to own the video (YouTube Data API v3 restriction). Non-owned videos will return 403 Forbidden errors, including many auto-generated caption tracks.. It is categorised as a Read tool in the Youtube MCP Server, which means it retrieves data without modifying state.
Add a rule in your Intercept YAML policy under the tools section for YOUTUBE_LOAD_CAPTIONS. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Youtube MCP server.
YOUTUBE_LOAD_CAPTIONS 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_LOAD_CAPTIONS rule in your Intercept 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 Intercept policy for YOUTUBE_LOAD_CAPTIONS. 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_LOAD_CAPTIONS is provided by the Youtube MCP server (youtube-mcp-server). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept