9 tools. 6 can modify or destroy data without limits.
6 write tools that can modify data. Rate limits recommended.
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Write operations (shelly_cover_control, shelly_discover_and_save_devices, shelly_discover_save_and_validate) modify state. Without rate limits, an agent can make hundreds of changes in seconds — faster than any human can review or revert.
shelly_cover_control:
rules:
- rate_limit: 30/hour Prevents bulk unintended modifications from agents caught in loops.
shelly_get_device_info:
rules:
- rate_limit: 60/minute Controls API costs and prevents retry loops from exhausting upstream rate limits.
The Shelly server has 6 write tools including shelly_cover_control, shelly_discover_and_save_devices, shelly_discover_save_and_validate. 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.
9 tools across 2 categories: Read, Write. 3 are read-only. 6 can modify, create, or delete data.
One line change. Instead of running the Shelly server directly, prefix it with Intercept: intercept -c shelly.yaml -- npx -y @shelly-mcp-server. Download a pre-built policy from policylayer.com/policies/shelly and adjust the limits to match your use case.
Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.