cache_version
Get the version of the cache server. Returns: Version string or error message
This record as markdown: /tools/aws/cache-version.md
What cache_version does on AWS
AI agents call cache_version 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 cache_version is rated Low
This tool retrieves version information from a cache server, which is a read-only operation. It has no capability to modify, execute code, delete data, or affect system state. The blast radius of misuse is minimal—an attacker could only learn the cache server version, which has low security impact in isolation.
From the tool's definition Tool name 'cache_version' and description 'Get the version of the cache server' with return value 'Version string or error message' indicate a query operation that retrieves metadata without side effects.
Attacks that exploit this kind of access
The rule that runs cache_version 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 cache_version, this is the rule to start with:
cache_version 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 cache_version call is checked against it from then on.
Questions about cache_version
Get the version of the cache server. Returns: Version string 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 cache_version: 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.
cache_version 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 cache_version 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 cache_version. 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.
cache_version 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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