32 tools. 8 can modify or destroy data without limits.
8 write tools that can modify data. Rate limits recommended.
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Write operations (configure_domain, sam_init, update_webapp_frontend) modify state. Without rate limits, an agent can make hundreds of changes in seconds — faster than any human can review or revert.
Execute tools (deploy_serverless_app_help, deploy_webapp, sam_build) trigger processes with side effects. Builds, notifications, workflows — all fired without throttling.
configure_domain:
rules:
- rate_limit: 30/hour Prevents bulk unintended modifications from agents caught in loops.
describe_schema:
rules:
- rate_limit: 60/minute Controls API costs and prevents retry loops from exhausting upstream rate limits.
The AWS Serverless MCP Server server has 3 write tools including configure_domain, sam_init, update_webapp_frontend. 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.
32 tools across 3 categories: Execute, Read, Write. 24 are read-only. 8 can modify, create, or delete data.
One line change. Instead of running the AWS Serverless MCP Server server directly, prefix it with Intercept: intercept -c aws-serverless-mcp-server.yaml -- npx -y @awslabs.aws-serverless-mcp-server. Download a pre-built policy from policylayer.com/policies/aws-serverless-mcp-server 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.