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AWS Cognito MCP Server

by gitCarrot

reset_password_veryify_code

Verify a password reset code and set a new password for AWS Cognito users. Provide username, verification code, and new password to complete the reset process.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
usernameYes
codeYes
newPasswordYes

Implementation Reference

  • The handler function for the reset_password_veryify_code tool. It creates a CognitoUser instance and uses confirmPassword to verify the code and set the new password, returning success or error messages.
    async ({ username, code, newPassword }) => {
        const cognitoUser = new CognitoUser({
            Username: username,
            Pool: userPool,
        });
    
        return new Promise((resolve, reject) => {
            cognitoUser.confirmPassword(code, newPassword, {
                onSuccess: () => {
                    console.log('Password reset completed');
                    resolve({
                        content: [
                            {
                                type: "text" as const,
                                text: "Password reset successfully",
                            },
                            {
                                type: "text" as const,
                                text: `Username: ${username}`,
                            },
                            {
                                type: "text" as const,
                                text: `Verification code: ${code.substr(0, 2)}****${code.substr(-2)}`,
                            },
                            {
                                type: "text" as const,
                                text: `Password length: ${newPassword.length} characters`,
                            }
                        ]
                    });
                },
                onFailure: (err) => {
                    console.error('Password reset failed:', err.message);
                    reject({
            content: [
                {
                                type: "text" as const,
                                text: `Password reset failed: ${err.message}`,
                            },
                            {
                                type: "text" as const,
                                text: `Error code: ${(err as any).code || 'Unknown'}`,
                            }
                        ]
                    });
                }
            });
        });
    }
  • Zod schema defining the input parameters: username, code, and newPassword.
    {
        username: z.string(),
        code: z.string(),
        newPassword: z.string(),
    },
  • index.ts:336-392 (registration)
    Registration of the reset_password_veryify_code tool using server.tool, including name, schema, and handler.
    server.tool(
        "reset_password_veryify_code",
        {
            username: z.string(),
            code: z.string(),
            newPassword: z.string(),
        },
        async ({ username, code, newPassword }) => {
            const cognitoUser = new CognitoUser({
                Username: username,
                Pool: userPool,
            });
    
            return new Promise((resolve, reject) => {
                cognitoUser.confirmPassword(code, newPassword, {
                    onSuccess: () => {
                        console.log('Password reset completed');
                        resolve({
                            content: [
                                {
                                    type: "text" as const,
                                    text: "Password reset successfully",
                                },
                                {
                                    type: "text" as const,
                                    text: `Username: ${username}`,
                                },
                                {
                                    type: "text" as const,
                                    text: `Verification code: ${code.substr(0, 2)}****${code.substr(-2)}`,
                                },
                                {
                                    type: "text" as const,
                                    text: `Password length: ${newPassword.length} characters`,
                                }
                            ]
                        });
                    },
                    onFailure: (err) => {
                        console.error('Password reset failed:', err.message);
                        reject({
                content: [
                    {
                                    type: "text" as const,
                                    text: `Password reset failed: ${err.message}`,
                                },
                                {
                                    type: "text" as const,
                                    text: `Error code: ${(err as any).code || 'Unknown'}`,
                                }
                            ]
                        });
                    }
                });
            });
        }
    )
Behavior1/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Tool has no description.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness1/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Tool has no description.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness1/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Tool has no description.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Tool has no description.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose1/5

Does the description clearly state what the tool does and how it differs from similar tools?

Tool has no description.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines1/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Tool has no description.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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