MCP-Confirm

Instructions

Implementation Reference

• src/index.ts:945-995 (handler)

  The handler function for the 'ask_yes_no' tool. It extracts the question from input arguments, constructs an elicitation request schema for a boolean answer, sends the request via sendElicitationRequest, and returns the user's yes/no response or handles errors.

  private async handleAskYesNo(args: Record<string, unknown>) {
    const question =
      typeof args.question === "string"
        ? args.question
        : "Please answer yes or no";
  
    const elicitationParams: ElicitationParams = {
      message: question,
      requestedSchema: {
        type: "object",
        properties: {
          answer: {
            type: "boolean",
            title: "Your Answer",
            description: "Please select yes or no",
          },
        },
        required: ["answer"],
      },
      // Use default timeout instead of hardcoded short timeout
      timeoutMs: this.config.defaultTimeoutMs,
    };
  
    try {
      const response = await this.sendElicitationRequest(elicitationParams);
  
      if (response.action === "accept" && response.content) {
        return {
          content: [
            {
              type: "text",
              text: `User answered: ${response.content.answer ? "Yes" : "No"}`,
            },
          ],
        };
      } else {
        return {
          content: [
            {
              type: "text",
              text: `User ${response.action}ed the question.`,
            },
          ],
        };
      }
    } catch (error) {
      return this.createErrorResponse(
        `Elicitation request failed: ${error instanceof Error ? error.message : String(error)}`
      );
    }
  }

• src/index.ts:244-260 (schema)

  Defines the schema for the 'ask_yes_no' tool, specifying the name, description, and input schema that requires a 'question' string parameter.

  private createAskYesNoTool(): Tool {
    return {
      name: "ask_yes_no",
      description:
        "Ask a yes/no confirmation question to the user when the AI needs clarification or verification",
      inputSchema: {
        type: "object",
        properties: {
          question: {
            type: "string",
            description: "The yes/no confirmation question to ask the user",
          },
        },
        required: ["question"],
      },
    };
  }

• src/index.ts:231-241 (registration)

  Registers the 'ask_yes_no' tool as part of the list of available tools returned in response to ListTools requests.

  private getToolDefinitions(): Tool[] {
    return [
      this.createAskYesNoTool(),
      this.createConfirmActionTool(),
      this.createClarifyIntentTool(),
      this.createVerifyUnderstandingTool(),
      this.createCollectRatingTool(),
      this.createElicitCustomTool(),
      this.createSearchLogsTool(),
      this.createAnalyzeLogsTool(),
    ];

• src/index.ts:518-519 (registration)

  Dispatches 'ask_yes_no' tool calls to the handleAskYesNo handler in the executeToolCall switch statement.

  case "ask_yes_no":
    return await this.handleAskYesNo(args);