AI agents call query_installed_packages to retrieve information from Cachyos without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves information about installed packages on the system. It performs a read-only operation with no side effects, no code execution, no data modification, and no destructive actions. Filtering by name/description is a standard query parameter that does not change system state. This is a straightforward information lookup operation.
From the tool's definition Tool name is 'query_installed_packages' and description states 'List installed packages, optionally filtered by name/description.' The verb 'List' and 'query' indicate a retrieval operation with no modification.
Attacks that exploit this kind of access
List installed packages, optionally filtered by name/description. It is categorised as a Read tool in the Cachyos MCP Server, which means it retrieves data without modifying state.
Register the Cachyos MCP server in PolicyLayer and add a rule for query_installed_packages: 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 Cachyos. Nothing to install.
query_installed_packages 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 query_installed_packages 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 query_installed_packages. 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.
query_installed_packages is provided by the Cachyos MCP server (raindancer118/cachyos-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
query_installed_packages is one line of Cachyos's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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