block_command
Prevent specific terminal commands from executing by adding them to a blacklist within the Desktop Commander MCP server.
Instructions
Add a command to the blacklist. Once blocked, the command cannot be executed until unblocked.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| command | Yes |
Implementation Reference
- src/command-manager.ts:33-41 (handler)Core handler function that implements the block_command tool logic: normalizes the command, checks if already blocked, adds to internal set if not, persists to config file, and returns boolean success.
async blockCommand(command: string): Promise<boolean> { command = command.toLowerCase().trim(); if (this.blockedCommands.has(command)) { return false; } this.blockedCommands.add(command); await this.saveBlockedCommands(); return true; } - src/tools/schemas.ts:23-25 (schema)Zod schema for input validation of block_command tool, requiring a 'command' string.
export const BlockCommandArgsSchema = z.object({ command: z.string(), }); - src/server.ts:103-107 (registration)Registers the block_command tool in the MCP server's list of tools, specifying name, description, and input schema.
name: "block_command", description: "Add a command to the blacklist. Once blocked, the command cannot be executed until unblocked.", inputSchema: zodToJsonSchema(BlockCommandArgsSchema), }, - src/server.ts:236-242 (handler)MCP server dispatch handler for block_command: parses input args using schema and delegates to commandManager.blockCommand, formats response.
case "block_command": { const parsed = BlockCommandArgsSchema.parse(args); const blockResult = await commandManager.blockCommand(parsed.command); return { content: [{ type: "text", text: blockResult }], }; }