27 tools. 5 can modify or destroy data without limits.
5 write tools that can modify data. Rate limits recommended.
Last updated:
Write operations (compose_system, generate_design_system, generate_service_blueprint) modify state. Without rate limits, an agent can make hundreds of changes in seconds — faster than any human can review or revert.
Execute tools (audit_page) trigger processes with side effects. Builds, notifications, workflows — all fired without throttling.
compose_system:
rules:
- rate_limit: 30/hour Prevents bulk unintended modifications from agents caught in loops.
audit_layout:
rules:
- rate_limit: 60/minute Controls API costs and prevents retry loops from exhausting upstream rate limits.
The Raven server has 4 write tools including compose_system, generate_design_system, generate_service_blueprint. Set rate limits in your policy file -- for example, rate_limit: 10/hour prevents an agent from making more than 10 modifications per hour. Intercept enforces this at the transport layer.
27 tools across 3 categories: Execute, Read, Write. 22 are read-only. 5 can modify, create, or delete data.
One line change. Instead of running the Raven server directly, prefix it with Intercept: intercept -c raven.yaml -- npx -y @raven-mcp. Download a pre-built policy from policylayer.com/policies/raven and adjust the limits to match your use case.
Starter policies available for each. Same risk classification, same one-command setup.
Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.