Count the number of set bits (1) in a range.
AI agents call bitmap_count to retrieve information from Amazon Data Processing MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple query/calculation on bitmap data to count set bits. It has no side effects—it does not create, modify, delete, or execute external operations. The operation is purely analytical and returns a computed result based on input parameters. This is a classic Read category operation with minimal risk of misuse.
From the tool's definition Tool name 'bitmap_count' and description 'Count the number of set bits (1) in a range' indicate a read-only operation that retrieves a numeric value from existing data without modification, deletion, or execution of arbitrary code.
Documented attack patterns abuse exactly the kind of access bitmap_count gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Amazon Data Processing MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for bitmap_count:
{
"version": "1",
"default": "deny",
"tools": {
"bitmap_count": {}
}
} bitmap_count is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Count the number of set bits (1) in a range. It is categorised as a Read tool in the Amazon Data Processing MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Amazon Data Processing 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 Data Processing 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 Data Processing MCP Server MCP server (awslabs.aws-dataprocessing-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Amazon Data Processing MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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805 Amazon Data Processing MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.