Get the session length (duration from start to the end of the last content)
AI agents call get_session_length to retrieve information from Pro Tools MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about a Pro Tools session (its total duration) without creating, modifying, executing, or deleting any data. It has no side effects and poses minimal security risk even if misused by an AI agent, as it only returns informational data about session length.
From the tool's definition Tool name 'get_session_length' and description 'Get the session length' indicate a retrieval operation with no modification or execution of external processes.
Documented attack patterns abuse exactly the kind of access get_session_length gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Pro Tools MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_session_length:
{
"version": "1",
"default": "deny",
"tools": {
"get_session_length": {}
}
}get_session_length is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get the session length (duration from start to the end of the last content). It is categorised as a Read tool in the Pro Tools MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Pro Tools MCP Server MCP server in PolicyLayer and add a rule for get_session_length: 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 Pro Tools MCP Server. Nothing to install.
get_session_length 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_session_length 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_session_length. 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_session_length is provided by the Pro Tools MCP Server MCP server (skrul/protools-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Pro Tools MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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36 Pro Tools MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.