Revert "feat: add two-layer tool call validation system (proactive + reactive) (#249)"

This reverts commit 9bc2360d31.

src/shared/tool-registry.ts

@@ -1,63 +0,0 @@
-export interface ToolRegistry {
-  isValidTool(name: string): boolean
-  getAllToolNames(): string[]
-}
-
-interface MCPServerConfig {
-  tools?: Array<{ name: string }>
-  [key: string]: unknown
-}
-
-/**
- * Create tool registry for validation
- * MCP tools use prefix matching: "serverName_methodName"
- */
-export function createToolRegistry(
-  builtinTools: Record<string, unknown>,
-  dynamicTools: Record<string, unknown>,
-  mcpServers: Record<string, MCPServerConfig>
-): ToolRegistry {
-  const toolNames = new Set<string>([
-    ...Object.keys(builtinTools),
-    ...Object.keys(dynamicTools),
-  ])
-
-  const mcpPrefixes = new Set<string>()
-
-  for (const serverName of Object.keys(mcpServers)) {
-    mcpPrefixes.add(`${serverName}_`)
-
-    const mcpTools = mcpServers[serverName]?.tools
-    if (mcpTools && Array.isArray(mcpTools)) {
-      for (const tool of mcpTools) {
-        if (tool.name) {
-          toolNames.add(tool.name)
-        }
-      }
-    }
-  }
-
-  return {
-    isValidTool(name: string): boolean {
-      if (!name || typeof name !== "string" || name.trim() === "") {
-        return false
-      }
-
-      if (toolNames.has(name)) {
-        return true
-      }
-
-      for (const prefix of mcpPrefixes) {
-        if (name.startsWith(prefix)) {
-          return true
-        }
-      }
-
-      return false
-    },
-
-    getAllToolNames(): string[] {
-      return Array.from(toolNames).sort()
-    },
-  }
-}