AI agents call list_running_pipelines to retrieve information from Gst without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only queries and returns information about existing pipeline states. It performs no side effects—no pipelines are created, modified, deleted, or executed. It is a straightforward informational read operation, appropriate for an introspection and development utility.
From the tool's definition Tool name 'list_running_pipelines' and description 'List all currently running GStreamer pipelines' indicate retrieval of status information with no modification, creation, deletion, or execution of pipelines.
Attacks that exploit this kind of access
List all currently running GStreamer pipelines. It is categorised as a Read tool in the Gst MCP Server, which means it retrieves data without modifying state.
Register the Gst MCP server in PolicyLayer and add a rule for list_running_pipelines: 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 Gst. Nothing to install.
list_running_pipelines 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_running_pipelines 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_running_pipelines. 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_running_pipelines is provided by the Gst MCP server (wizenink/gst-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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