Search the invtypes.txt file for inventory type definitions in the game.
AI agents call search_invtypes to retrieve information from OSRS MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries game data definitions from a file without creating, modifying, deleting, or executing any operations. It is a pure read operation with no side effects. The low severity reflects that misuse would only expose game data already publicly available through the OSRS Wiki API, with no impact on systems, accounts, or assets.
From the tool's definition Tool name 'search_invtypes' and description 'Search the invtypes.txt file for inventory type definitions' indicate a query operation against a static game data file with no modification capability.
Attacks that exploit this kind of access
Search the invtypes.txt file for inventory type definitions in the game. It is categorised as a Read tool in the OSRS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the OSRS MCP Server MCP server in PolicyLayer and add a rule for search_invtypes: 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 OSRS MCP Server. Nothing to install.
search_invtypes 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 search_invtypes 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 search_invtypes. 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.
search_invtypes is provided by the OSRS MCP Server MCP server (joshhmann/mcp-osrs). 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.
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