Single tool 'revoke_authorization' has a clear, descriptive name and good description (127 chars), but the input schema is completely empty ({}). The tool lacks parameter descriptions, type definitions, and output schema documentation. No error handling guidance. Tool is write-risk but lacks confirmation/dry-run pattern. Overall definition quality is poor due to schema absence and missing output documentation.

• Define explicit input schema with type='object', properties={}, required=[]. Even if no parameters, schema must be formally declared, not empty dict.
• Document output schema: e.g., {type: 'object', properties: {success: {type: 'boolean'}, revoked_services: {type: 'array', items: {type: 'string'}}, error: {type: 'string'}}}.
• Add destructiveHint: true annotation to signal this is a write operation that cannot be undone.
• Enhance description with error guidance: 'Returns success: true if all tokens revoked. On failure, returns error message and list of services that could not be revoked. Retry-safe if service is temporarily unavailable.'
• Consider adding a confirm_revoke_authorization tool or dry-run parameter to prevent accidental sign-outs in agent workflows.