AI agents call get_rate_limits to retrieve information from Waymark without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves rate limit metrics without modifying, executing, or destructively altering any state. It is a read-only query for monitoring/observability purposes. The information retrieved (rate limit statistics) poses minimal risk if exposed to an AI agent.
From the tool's definition Tool name is 'get_rate_limits' and description states 'Get Claude Code and Codex CLI rate limit usage' — a retrieval operation with no side effects.
Attacks that exploit this kind of access
Get Claude Code and Codex CLI rate limit usage for this machine. It is categorised as a Read tool in the Waymark MCP Server, which means it retrieves data without modifying state.
Register the Waymark MCP server in PolicyLayer and add a rule for get_rate_limits: 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 Waymark. Nothing to install.
get_rate_limits 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 get_rate_limits 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 get_rate_limits. 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.
get_rate_limits is provided by the Waymark MCP server (waymarks/waymark). 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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