Print a variable.
AI agents call print_var to retrieve information from WineDbg MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a debugging inspection tool that queries variable values at runtime. It has no side effects, does not modify program state, does not execute code, and does not delete or commit financial operations.
From the tool's definition The tool name 'print_var' and description 'Print a variable' clearly indicate a read-only operation that retrieves and displays variable state during debugging without modifying execution or data.
Attacks that exploit this kind of access
Print a variable. It is categorised as a Read tool in the WineDbg MCP Server MCP Server, which means it retrieves data without modifying state.
Register the WineDbg MCP Server MCP server in PolicyLayer and add a rule for print_var: 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 WineDbg MCP Server. Nothing to install.
print_var 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 print_var 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 print_var. 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.
print_var is provided by the WineDbg MCP Server MCP server (maci0/mcp-winedbg). 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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