ToolFence

Vendor-neutral policy firewall enforcing least-privilege rules on MCP tool calls.

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ToolFence is a vendor-neutral policy firewall for MCP tool calls that enforces one portable least-privilege policy between AI agents and MCP servers, defaulting to ask-or-deny so dangerous or unrecognized calls stop before execution and uncertain ones require human approval, without changing the underlying MCP host or server. It targets teams running AI agents with MCP tools who need consistent policy enforcement across whichever agent host they use.

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