The MCP server map The Osprey agent's tool calls pass the PreToolUse hook chain before reaching any of the seven core stdio MCP servers, which run as child processes of the harness and expose no network port. TOOL CALLS · STDIO JSON-RPC STDIO CHILD PROCESSES · NO NETWORK PORT Osprey agent reads .mcp.json PreToolUse hook chain writes_check · limits · approval control_system read · write · archiver channel-finder 1 of 4 pipelines workspace artifacts · session state python_executor execute ariel logbook search facility_knowledge OKF bundle graph facility graph · Cypher rendered from config.yml by osprey build — profiles can inject more servers