AI agents call get_game_schema to retrieve information from Mcp Steam without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves schema information (achievement and stat definitions) from Steam, which is a read-only operation that queries data without side effects. It does not create, modify, delete, or execute anything. The blast radius of misuse is minimal—an agent could only retrieve publicly available game metadata.
From the tool's definition Tool name 'get_game_schema' and description 'Get achievement and stat definitions for a Steam game' indicates retrieval of metadata/definitions with no modification, creation, or execution of commands.
Attacks that exploit this kind of access
Get achievement and stat definitions for a Steam game. It is categorised as a Read tool in the Mcp Steam MCP Server, which means it retrieves data without modifying state.
Register the Mcp Steam MCP server in PolicyLayer and add a rule for get_game_schema: 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 Mcp Steam. Nothing to install.
get_game_schema 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 get_game_schema 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 get_game_schema. 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.
get_game_schema is provided by the Mcp Steam MCP server (obrien-matthew/mcp-steam). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →