sorted_set_cardinality
Get number of members in sorted set. Args: key: The name of the key min_score: Minimum score (optional) max_score: Maximum score (optional) Returns: Number of members or error message
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What sorted_set_cardinality does on AWS
AI agents call sorted_set_cardinality to retrieve information from AWS without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why sorted_set_cardinality is rated Low
This tool only retrieves a count of members in a sorted set, optionally filtered by score range. It performs a read-only query with no side effects, no data modification, and no destructive operations.
From the tool's definition Get number of members in sorted set
Attacks that exploit this kind of access
The rule that runs sorted_set_cardinality safely
PolicyLayer is an MCP gateway: it sits between your AI agents and AWS, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For sorted_set_cardinality, this is the rule to start with:
sorted_set_cardinality is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect AWS, apply this rule, and every sorted_set_cardinality call is checked against it from then on.
Questions about sorted_set_cardinality
Get number of members in sorted set. Args: key: The name of the key min_score: Minimum score (optional) max_score: Maximum score (optional) Returns: Number of members or error message. It is categorised as a Read tool in the AWS MCP Server, which means it retrieves data without modifying state.
Register the AWS MCP server in PolicyLayer and add a rule for sorted_set_cardinality: 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 AWS. Nothing to install.
sorted_set_cardinality 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 sorted_set_cardinality 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 sorted_set_cardinality. 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.
sorted_set_cardinality is provided by the AWS MCP server (@awslabs/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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