Search the varptypes.txt file for player variables (varps) that store player state and progress.
AI agents call search_varptypes 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 performs a read-only query against a game data file to retrieve information about player state variables. It has no side effects, cannot modify or delete data, and poses minimal security risk. It fits the Read category alongside sibling tools like osrs_wiki_search and search_data_file which similarly query game data definitions.
From the tool's definition Tool searches and queries varptypes.txt file for player variables. The description indicates it 'Search[es] the varptypes.txt file', which is a retrieval operation with no modification capability.
Attacks that exploit this kind of access
Search the varptypes.txt file for player variables (varps) that store player state and progress. 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_varptypes: 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_varptypes 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_varptypes 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_varptypes. 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_varptypes 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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