Count the number of set bits (1) in a range.
AI agents call bitmap_count to retrieve information from Amazon MQ MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure read operation that queries/analyzes data (counting set bits in a range) with no side effects, no data modification, and no capability to execute arbitrary code or trigger external operations. It is a simple computational query fitting the Read category. Severity is low because even if misused, counting bits in a range cannot cause harm to systems or data.
From the tool's definition Tool name 'bitmap_count' with description 'Count the number of set bits (1) in a range' — performs a read-only counting operation on existing data without modification, deletion, or execution of external commands.
Attacks that exploit this kind of access
Count the number of set bits (1) in a range. It is categorised as a Read tool in the Amazon MQ MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Amazon MQ MCP Server MCP server in PolicyLayer and add a rule for bitmap_count: 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 Amazon MQ MCP Server. Nothing to install.
bitmap_count 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 bitmap_count 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 bitmap_count. 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.
bitmap_count is provided by the Amazon MQ MCP Server MCP server (awslabs.amazon-mq-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.