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MCP Middleware API

Wrap MCP tool handlers with Visus Agent Sandbox policy enforcement.

Functions​

wrapToolHandler​

function wrapToolHandler<T>(
  handler: (args: T) => Promise<unknown>,
  config: ShadowExecutorConfig
): (args: T) => Promise<unknown>

Wrap single MCP tool handler.

wrapAllToolHandlers​

function wrapAllToolHandlers(
  handlers: Record<string, Function>,
  config: ShadowExecutorConfig
): Record<string, Function>

Wrap multiple tool handlers.

Error Types​

class BlockedActionError extends Error {
  decision: PolicyDecision;
}

Source​

Implementation: packages/sdk/src/mcp/middleware.ts