Search the npctypes.txt file for NPC (non-player character) definitions.
AI agents call search_npctypes 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 searches a data file for NPC definitions—a pure read operation. It retrieves information about non-player characters from what appears to be a configuration or definition file. There are no side effects, no data modifications, no code execution, and no financial implications. The context of OSRS Wiki API and game data definitions confirms this is a lookup/query tool.
From the tool's definition Tool name 'search_npctypes' and description 'Search the npctypes.txt file for NPC definitions' indicate a query operation over static game data files with no modification, deletion, or execution capability.
Attacks that exploit this kind of access
Search the npctypes.txt file for NPC (non-player character) definitions. 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_npctypes: 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_npctypes 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_npctypes 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_npctypes. 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_npctypes 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.
Teams ship this data inside their own products. See what a licence covers →