Inspect wrapper-managed diagnostics for a target session.
AI agents call stdio_mcp_get_session to retrieve information from MCP Stdio Wrapper without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves diagnostic information about an active session managed by the wrapper. 'Inspect' is a read-only operation that queries state without side effects. No creation, modification, deletion, code execution, or financial impact is possible. The low severity reflects that diagnostic data exposure poses minimal risk compared to tools that could modify or execute operations.
From the tool's definition Tool name 'stdio_mcp_get_session' and description 'Inspect wrapper-managed diagnostics for a target session' indicate retrieval of diagnostic/state information with no modification or execution capability.
Attacks that exploit this kind of access
Inspect wrapper-managed diagnostics for a target session. It is categorised as a Read tool in the MCP Stdio Wrapper MCP Server, which means it retrieves data without modifying state.
Register the MCP Stdio Wrapper MCP server in PolicyLayer and add a rule for stdio_mcp_get_session: 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 MCP Stdio Wrapper. Nothing to install.
stdio_mcp_get_session 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 stdio_mcp_get_session 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 stdio_mcp_get_session. 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.
stdio_mcp_get_session is provided by the MCP Stdio Wrapper MCP server (joshuagreeff/mcp-stdio-wrapper). 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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