This record as markdown: /tools/io-github-kivanccakmak-yaver/free-memory.md
What free_memory does on Yaver
AI agents call free_memory to retrieve information from Yaver without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why free_memory is rated Low
This tool retrieves and displays memory/swap usage information from the system. It is a read-only operation with no capability to modify, execute, or delete data. The low severity reflects minimal blast radius—exposing memory metrics to an AI agent poses no risk of data loss, financial impact, or system compromise.
From the tool's definition Tool name 'free_memory' and description 'Show memory/swap usage' indicate a query operation that retrieves system memory statistics without modification or side effects.
Attacks that exploit this kind of access
The rule that runs free_memory safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Yaver, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For free_memory, this is the rule to start with:
free_memory 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 Yaver, apply this rule, and every free_memory call is checked against it from then on.
Questions about free_memory
Show memory/swap usage. It is categorised as a Read tool in the Yaver MCP Server, which means it retrieves data without modifying state.
Register the Yaver MCP server in PolicyLayer and add a rule for free_memory: 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 Yaver. Nothing to install.
free_memory 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 free_memory 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 free_memory. 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.
free_memory is provided by the Yaver MCP server (yaver-cli). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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