Check if a specific version of an app is up to date
AI agents call check_app_update to retrieve information from Steam 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 status check by querying whether an app version is current. It retrieves data and has no side effects—no data is created, modified, deleted, or executed. It aligns with the Read category (get, fetch, query operations). Severity is low because misuse would only expose informational data about app versions, with no blast radius for unintended modifications or executions.
From the tool's definition Tool name 'check_app_update' and description 'Check if a specific version of an app is up to date' indicates a query operation that retrieves version/status information without modifying or executing actions.
Attacks that exploit this kind of access
Check if a specific version of an app is up to date. It is categorised as a Read tool in the Steam MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Steam MCP Server MCP server in PolicyLayer and add a rule for check_app_update: 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 Steam MCP Server. Nothing to install.
check_app_update 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 check_app_update 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 check_app_update. 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.
check_app_update is provided by the Steam MCP Server MCP server (sharkusmanch/steam-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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